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natbib.sty
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natbib.sty
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%%
%% This is file `natbib.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% natbib.dtx (with options: `package,all')
%% =============================================
%% IMPORTANT NOTICE:
%%
%% This program can be redistributed and/or modified under the terms
%% of the LaTeX Project Public License Distributed from CTAN
%% archives in directory macros/latex/base/lppl.txt; either
%% version 1 of the License, or any later version.
%%
%% This is a generated file.
%% It may not be distributed without the original source file natbib.dtx.
%%
%% Full documentation can be obtained by LaTeXing that original file.
%% Only a few abbreviated comments remain here to describe the usage.
%% =============================================
%% Copyright 1993-2010 Patrick W Daly
%% Max-Planck-Institut f\"ur Sonnensystemforschung
%% Max-Planck-Str. 2
%% D-37191 Katlenburg-Lindau
%% Germany
%% E-mail: daly@mps.mpg.de
\NeedsTeXFormat{LaTeX2e}[1995/06/01]
\ProvidesPackage{natbib}
[2010/09/13 8.31b (PWD, AO)]
% This package reimplements the LaTeX \cite command to be used for various
% citation styles, both author-year and numerical. It accepts BibTeX
% output intended for many other packages, and therefore acts as a
% general, all-purpose citation-style interface.
%
% With standard numerical .bst files, only numerical citations are
% possible. With an author-year .bst file, both numerical and
% author-year citations are possible.
%
% If author-year citations are selected, \bibitem must have one of the
% following forms:
% \bibitem[Jones et al.(1990)]{key}...
% \bibitem[Jones et al.(1990)Jones, Baker, and Williams]{key}...
% \bibitem[Jones et al., 1990]{key}...
% \bibitem[\protect\citeauthoryear{Jones, Baker, and Williams}{Jones
% et al.}{1990}]{key}...
% \bibitem[\protect\citeauthoryear{Jones et al.}{1990}]{key}...
% \bibitem[\protect\astroncite{Jones et al.}{1990}]{key}...
% \bibitem[\protect\citename{Jones et al., }1990]{key}...
% \harvarditem[Jones et al.]{Jones, Baker, and Williams}{1990}{key}...
%
% This is either to be made up manually, or to be generated by an
% appropriate .bst file with BibTeX.
% Author-year mode || Numerical mode
% Then, \citet{key} ==>> Jones et al. (1990) || Jones et al. [21]
% \citep{key} ==>> (Jones et al., 1990) || [21]
% Multiple citations as normal:
% \citep{key1,key2} ==>> (Jones et al., 1990; Smith, 1989) || [21,24]
% or (Jones et al., 1990, 1991) || [21,24]
% or (Jones et al., 1990a,b) || [21,24]
% \cite{key} is the equivalent of \citet{key} in author-year mode
% and of \citep{key} in numerical mode
% Full author lists may be forced with \citet* or \citep*, e.g.
% \citep*{key} ==>> (Jones, Baker, and Williams, 1990)
% Optional notes as:
% \citep[chap. 2]{key} ==>> (Jones et al., 1990, chap. 2)
% \citep[e.g.,][]{key} ==>> (e.g., Jones et al., 1990)
% \citep[see][pg. 34]{key}==>> (see Jones et al., 1990, pg. 34)
% (Note: in standard LaTeX, only one note is allowed, after the ref.
% Here, one note is like the standard, two make pre- and post-notes.)
% \citealt{key} ==>> Jones et al. 1990
% \citealt*{key} ==>> Jones, Baker, and Williams 1990
% \citealp{key} ==>> Jones et al., 1990
% \citealp*{key} ==>> Jones, Baker, and Williams, 1990
% Additional citation possibilities (both author-year and numerical modes)
% \citeauthor{key} ==>> Jones et al.
% \citeauthor*{key} ==>> Jones, Baker, and Williams
% \citeyear{key} ==>> 1990
% \citeyearpar{key} ==>> (1990)
% \citetext{priv. comm.} ==>> (priv. comm.)
% \citenum{key} ==>> 11 [non-superscripted]
% Note: full author lists depends on whether the bib style supports them;
% if not, the abbreviated list is printed even when full requested.
%
% For names like della Robbia at the start of a sentence, use
% \Citet{dRob98} ==>> Della Robbia (1998)
% \Citep{dRob98} ==>> (Della Robbia, 1998)
% \Citeauthor{dRob98} ==>> Della Robbia
%
%
% Citation aliasing is achieved with
% \defcitealias{key}{text}
% \citetalias{key} ==>> text
% \citepalias{key} ==>> (text)
%
% Defining the citation mode and punctual (citation style)
% \setcitestyle{<comma-separated list of keywords, same
% as the package options>}
% Example: \setcitestyle{square,semicolon}
% Alternatively:
% Use \bibpunct with 6 mandatory arguments:
% 1. opening bracket for citation
% 2. closing bracket
% 3. citation separator (for multiple citations in one \cite)
% 4. the letter n for numerical styles, s for superscripts
% else anything for author-year
% 5. punctuation between authors and date
% 6. punctuation between years (or numbers) when common authors missing
% One optional argument is the character coming before post-notes. It
% appears in square braces before all other arguments. May be left off.
% Example (and default) \bibpunct[, ]{(}{)}{;}{a}{,}{,}
%
% To make this automatic for a given bib style, named newbib, say, make
% a local configuration file, natbib.cfg, with the definition
% \newcommand{\bibstyle@newbib}{\bibpunct...}
% Then the \bibliographystyle{newbib} will cause \bibstyle@newbib to
% be called on THE NEXT LATEX RUN (via the aux file).
%
% Such preprogrammed definitions may be invoked anywhere in the text
% by calling \citestyle{newbib}. This is only useful if the style specified
% differs from that in \bibliographystyle.
%
% With \citeindextrue and \citeindexfalse, one can control whether the
% \cite commands make an automatic entry of the citation in the .idx
% indexing file. For this, \makeindex must also be given in the preamble.
%
% Package Options: (for selecting punctuation)
% round - round parentheses are used (default)
% square - square brackets are used [option]
% curly - curly braces are used {option}
% angle - angle brackets are used <option>
% semicolon - multiple citations separated by semi-colon (default)
% colon - same as semicolon, an earlier confusion
% comma - separated by comma
% authoryear - selects author-year citations (default)
% numbers- selects numerical citations
% super - numerical citations as superscripts
% sort - sorts multiple citations according to order in ref. list
% sort&compress - like sort, but also compresses numerical citations
% compress - compresses without sorting
% longnamesfirst - makes first citation full author list
% sectionbib - puts bibliography in a \section* instead of \chapter*
% merge - allows the citation key to have a * prefix,
% signifying to merge its reference with that of the previous citation.
% elide - if references are merged, repeated portions of later ones may be removed.
% mcite - recognizes and ignores the * prefix for merging.
% Punctuation so selected dominates over any predefined ones.
% Package options are called as, e.g.
% \usepackage[square,comma]{natbib}
% LaTeX the source file natbib.dtx to obtain more details
% or the file natnotes.tex for a brief reference sheet.
%-----------------------------------------------------------
\providecommand\@ifxundefined[1]{%
\ifx#1\@undefined\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
}%
\providecommand\@ifnum[1]{%
\ifnum#1\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
}%
\providecommand\@ifx[1]{%
\ifx#1\expandafter\@firstoftwo\else\expandafter\@secondoftwo\fi
}%
\providecommand\appdef[2]{%
\toks@\expandafter{#1}\@temptokena{#2}%
\edef#1{\the\toks@\the\@temptokena}%
}%
\@ifclassloaded{agu2001}{\PackageError{natbib}
{The agu2001 class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
\@ifclassloaded{agutex}{\PackageError{natbib}
{The AGUTeX class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
\@ifclassloaded{aguplus}{\PackageError{natbib}
{The aguplus class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
\@ifclassloaded{nlinproc}{\PackageError{natbib}
{The nlinproc class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
\@ifclassloaded{egs}{\PackageError{natbib}
{The egs class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
\@ifclassloaded{egu}{\PackageError{natbib}
{The egu class already includes natbib coding,\MessageBreak
so you should not add it explicitly}
{Type <Return> for now, but then later remove\MessageBreak
the command \protect\usepackage{natbib} from the document}
\endinput}{}
% Define citation punctuation for some author-year styles
% One may add and delete at this point
% Or put additions into local configuration file natbib.cfg
\newcommand\bibstyle@chicago{\bibpunct{(}{)}{;}{a}{,}{,}}
\newcommand\bibstyle@named{\bibpunct{[}{]}{;}{a}{,}{,}}
\newcommand\bibstyle@agu{\bibpunct{[}{]}{;}{a}{,}{,~}}%Amer. Geophys. Union
\newcommand\bibstyle@copernicus{\bibpunct{(}{)}{;}{a}{,}{,}}%Copernicus Publications
\let\bibstyle@egu=\bibstyle@copernicus
\let\bibstyle@egs=\bibstyle@copernicus
\newcommand\bibstyle@agsm{\bibpunct{(}{)}{,}{a}{}{,}\gdef\harvardand{\&}}
\newcommand\bibstyle@kluwer{\bibpunct{(}{)}{,}{a}{}{,}\gdef\harvardand{\&}}
\newcommand\bibstyle@dcu{\bibpunct{(}{)}{;}{a}{;}{,}\gdef\harvardand{and}}
\newcommand\bibstyle@aa{\bibpunct{(}{)}{;}{a}{}{,}} %Astronomy & Astrophysics
\newcommand\bibstyle@pass{\bibpunct{(}{)}{;}{a}{,}{,}}%Planet. & Space Sci
\newcommand\bibstyle@anngeo{\bibpunct{(}{)}{;}{a}{,}{,}}%Annales Geophysicae
\newcommand\bibstyle@nlinproc{\bibpunct{(}{)}{;}{a}{,}{,}}%Nonlin.Proc.Geophys.
% Define citation punctuation for some numerical styles
\newcommand\bibstyle@cospar{\bibpunct{/}{/}{,}{n}{}{}%
\gdef\bibnumfmt##1{##1.}}
\newcommand\bibstyle@esa{\bibpunct{(Ref.~}{)}{,}{n}{}{}%
\gdef\bibnumfmt##1{##1.\hspace{1em}}}
\newcommand\bibstyle@nature{\bibpunct{}{}{,}{s}{}{\textsuperscript{,}}%
\gdef\bibnumfmt##1{##1.}}
% The standard LaTeX styles
\newcommand\bibstyle@plain{\bibpunct{[}{]}{,}{n}{}{,}}
\let\bibstyle@alpha=\bibstyle@plain
\let\bibstyle@abbrv=\bibstyle@plain
\let\bibstyle@unsrt=\bibstyle@plain
% The author-year modifications of the standard styles
\newcommand\bibstyle@plainnat{\bibpunct{[}{]}{,}{a}{,}{,}}
\let\bibstyle@abbrvnat=\bibstyle@plainnat
\let\bibstyle@unsrtnat=\bibstyle@plainnat
\newif\ifNAT@numbers \NAT@numbersfalse
\newif\ifNAT@super \NAT@superfalse
\let\NAT@merge\z@
\DeclareOption{numbers}{\NAT@numberstrue
\ExecuteOptions{square,comma,nobibstyle}}
\DeclareOption{super}{\NAT@supertrue\NAT@numberstrue
\renewcommand\NAT@open{}\renewcommand\NAT@close{}
\ExecuteOptions{nobibstyle}}
\DeclareOption{authoryear}{\NAT@numbersfalse
\ExecuteOptions{round,semicolon,bibstyle}}
\DeclareOption{round}{%
\renewcommand\NAT@open{(} \renewcommand\NAT@close{)}
\ExecuteOptions{nobibstyle}}
\DeclareOption{square}{%
\renewcommand\NAT@open{[} \renewcommand\NAT@close{]}
\ExecuteOptions{nobibstyle}}
\DeclareOption{angle}{%
\renewcommand\NAT@open{$<$} \renewcommand\NAT@close{$>$}
\ExecuteOptions{nobibstyle}}
\DeclareOption{curly}{%
\renewcommand\NAT@open{\{} \renewcommand\NAT@close{\}}
\ExecuteOptions{nobibstyle}}
\DeclareOption{comma}{\renewcommand\NAT@sep{,}
\ExecuteOptions{nobibstyle}}
\DeclareOption{semicolon}{\renewcommand\NAT@sep{;}
\ExecuteOptions{nobibstyle}}
\DeclareOption{colon}{\ExecuteOptions{semicolon}}
\DeclareOption{nobibstyle}{\let\bibstyle=\@gobble}
\DeclareOption{bibstyle}{\let\bibstyle=\@citestyle}
\newif\ifNAT@openbib \NAT@openbibfalse
\DeclareOption{openbib}{\NAT@openbibtrue}
\DeclareOption{sectionbib}{\def\NAT@sectionbib{on}}
\def\NAT@sort{\z@}
\def\NAT@cmprs{\z@}
\DeclareOption{sort}{\def\NAT@sort{\@ne}}
\DeclareOption{compress}{\def\NAT@cmprs{\@ne}}
\DeclareOption{sort&compress}{\def\NAT@sort{\@ne}\def\NAT@cmprs{\@ne}}
\DeclareOption{mcite}{\let\NAT@merge\@ne}
\DeclareOption{merge}{\@ifnum{\NAT@merge<\tw@}{\let\NAT@merge\tw@}{}}
\DeclareOption{elide}{\@ifnum{\NAT@merge<\thr@@}{\let\NAT@merge\thr@@}{}}
\@ifpackageloaded{cite}{\PackageWarningNoLine{natbib}
{The `cite' package should not be used\MessageBreak
with natbib. Use option `sort' instead}\ExecuteOptions{sort}}{}
\@ifpackageloaded{mcite}{\PackageWarningNoLine{natbib}
{The `mcite' package should not be used\MessageBreak
with natbib. Use option `merge' instead}\ExecuteOptions{merge}}{}
\@ifpackageloaded{citeref}{\PackageError{natbib}
{The `citeref' package must be loaded after natbib}%
{Move \protect\usepackage{citeref} to after \string\usepackage{natbib}}}{}
\newif\ifNAT@longnames\NAT@longnamesfalse
\DeclareOption{longnamesfirst}{\NAT@longnamestrue}
\DeclareOption{nonamebreak}{\def\NAT@nmfmt#1{\mbox{\NAT@up#1}}}
\def\NAT@nmfmt#1{{\NAT@up#1}}
\renewcommand\bibstyle[1]{\csname bibstyle@#1\endcsname}
\AtBeginDocument{\global\let\bibstyle=\@gobble}
\let\@citestyle\bibstyle
\newcommand\citestyle[1]{\@citestyle{#1}\let\bibstyle\@gobble}
\newcommand\bibpunct[7][, ]%
{\gdef\NAT@open{#2}\gdef\NAT@close{#3}\gdef
\NAT@sep{#4}\global\NAT@numbersfalse
\ifx #5n\global\NAT@numberstrue\global\NAT@superfalse
\else
\ifx #5s\global\NAT@numberstrue\global\NAT@supertrue
\fi\fi
\gdef\NAT@aysep{#6}\gdef\NAT@yrsep{#7}%
\gdef\NAT@cmt{#1}%
\NAT@@setcites
}
\newcommand\setcitestyle[1]{
\@for\@tempa:=#1\do
{\def\@tempb{round}\ifx\@tempa\@tempb
\renewcommand\NAT@open{(}\renewcommand\NAT@close{)}\fi
\def\@tempb{square}\ifx\@tempa\@tempb
\renewcommand\NAT@open{[}\renewcommand\NAT@close{]}\fi
\def\@tempb{angle}\ifx\@tempa\@tempb
\renewcommand\NAT@open{$<$}\renewcommand\NAT@close{$>$}\fi
\def\@tempb{curly}\ifx\@tempa\@tempb
\renewcommand\NAT@open{\{}\renewcommand\NAT@close{\}}\fi
\def\@tempb{semicolon}\ifx\@tempa\@tempb
\renewcommand\NAT@sep{;}\fi
\def\@tempb{colon}\ifx\@tempa\@tempb
\renewcommand\NAT@sep{;}\fi
\def\@tempb{comma}\ifx\@tempa\@tempb
\renewcommand\NAT@sep{,}\fi
\def\@tempb{authoryear}\ifx\@tempa\@tempb
\NAT@numbersfalse\fi
\def\@tempb{numbers}\ifx\@tempa\@tempb
\NAT@numberstrue\NAT@superfalse\fi
\def\@tempb{super}\ifx\@tempa\@tempb
\NAT@numberstrue\NAT@supertrue\fi
\expandafter\NAT@find@eq\@tempa=\relax\@nil
\if\@tempc\relax\else
\expandafter\NAT@rem@eq\@tempc
\def\@tempb{open}\ifx\@tempa\@tempb
\xdef\NAT@open{\@tempc}\fi
\def\@tempb{close}\ifx\@tempa\@tempb
\xdef\NAT@close{\@tempc}\fi
\def\@tempb{aysep}\ifx\@tempa\@tempb
\xdef\NAT@aysep{\@tempc}\fi
\def\@tempb{yysep}\ifx\@tempa\@tempb
\xdef\NAT@yrsep{\@tempc}\fi
\def\@tempb{notesep}\ifx\@tempa\@tempb
\xdef\NAT@cmt{\@tempc}\fi
\def\@tempb{citesep}\ifx\@tempa\@tempb
\xdef\NAT@sep{\@tempc}\fi
\fi
}%
\NAT@@setcites
}
\def\NAT@find@eq#1=#2\@nil{\def\@tempa{#1}\def\@tempc{#2}}
\def\NAT@rem@eq#1={\def\@tempc{#1}}
\def\NAT@@setcites{\global\let\bibstyle\@gobble}
\AtBeginDocument{\let\NAT@@setcites\NAT@set@cites}
\newcommand\NAT@open{(} \newcommand\NAT@close{)}
\newcommand\NAT@sep{;}
\ProcessOptions
\newcommand\NAT@aysep{,} \newcommand\NAT@yrsep{,}
\newcommand\NAT@cmt{, }
\newcommand\NAT@cite%
[3]{\ifNAT@swa\NAT@@open\if*#2*\else#2\NAT@spacechar\fi
#1\if*#3*\else\NAT@cmt#3\fi\NAT@@close\else#1\fi\endgroup}
\newcommand\NAT@citenum%
[3]{\ifNAT@swa\NAT@@open\if*#2*\else#2\NAT@spacechar\fi
#1\if*#3*\else\NAT@cmt#3\fi\NAT@@close\else#1\fi\endgroup}
\newcommand\NAT@citesuper[3]{\ifNAT@swa
\if*#2*\else#2\NAT@spacechar\fi
\unskip\kern\p@\textsuperscript{\NAT@@open#1\NAT@@close}%
\if*#3*\else\NAT@spacechar#3\fi\else #1\fi\endgroup}
\providecommand\textsuperscript[1]{\mbox{$^{\mbox{\scriptsize#1}}$}}
\begingroup \catcode`\_=8
\gdef\NAT@ifcat@num#1{%
\ifcat_\ifnum\z@<0#1_\else A\fi
\expandafter\@firstoftwo
\else
\expandafter\@secondoftwo
\fi
}%
\endgroup
\providecommand\@firstofone[1]{#1}
\newcommand\NAT@citexnum{}
\def\NAT@citexnum[#1][#2]#3{%
\NAT@reset@parser
\NAT@sort@cites{#3}%
\NAT@reset@citea
\@cite{\def\NAT@num{-1}\let\NAT@last@yr\relax\let\NAT@nm\@empty
\@for\@citeb:=\NAT@cite@list\do
{\@safe@activestrue
\edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
\@safe@activesfalse
\@ifundefined{b@\@citeb\@extra@b@citeb}{%
{\reset@font\bfseries?}
\NAT@citeundefined\PackageWarning{natbib}%
{Citation `\@citeb' on page \thepage \space undefined}}%
{\let\NAT@last@num\NAT@num\let\NAT@last@nm\NAT@nm
\NAT@parse{\@citeb}%
\ifNAT@longnames\@ifundefined{bv@\@citeb\@extra@b@citeb}{%
\let\NAT@name=\NAT@all@names
\global\@namedef{bv@\@citeb\@extra@b@citeb}{}}{}%
\fi
\ifNAT@full\let\NAT@nm\NAT@all@names\else
\let\NAT@nm\NAT@name\fi
\ifNAT@swa
\@ifnum{\NAT@ctype>\@ne}{%
\@citea
\NAT@hyper@{\@ifnum{\NAT@ctype=\tw@}{\NAT@test{\NAT@ctype}}{\NAT@alias}}%
}{%
\@ifnum{\NAT@cmprs>\z@}{%
\NAT@ifcat@num\NAT@num
{\let\NAT@nm=\NAT@num}%
{\def\NAT@nm{-2}}%
\NAT@ifcat@num\NAT@last@num
{\@tempcnta=\NAT@last@num\relax}%
{\@tempcnta\m@ne}%
\@ifnum{\NAT@nm=\@tempcnta}{%
\@ifnum{\NAT@merge>\@ne}{}{\NAT@last@yr@mbox}%
}{%
\advance\@tempcnta by\@ne
\@ifnum{\NAT@nm=\@tempcnta}{%
\ifx\NAT@last@yr\relax
\def@NAT@last@yr{\@citea}%
\else
\def@NAT@last@yr{--\NAT@penalty}%
\fi
}{%
\NAT@last@yr@mbox
}%
}%
}{%
\@tempswatrue
\@ifnum{\NAT@merge>\@ne}{\@ifnum{\NAT@last@num=\NAT@num\relax}{\@tempswafalse}{}}{}%
\if@tempswa\NAT@citea@mbox\fi
}%
}%
\NAT@def@citea
\else
\ifcase\NAT@ctype
\ifx\NAT@last@nm\NAT@nm \NAT@yrsep\NAT@penalty\NAT@space\else
\@citea \NAT@test{\@ne}\NAT@spacechar\NAT@mbox{\NAT@super@kern\NAT@@open}%
\fi
\if*#1*\else#1\NAT@spacechar\fi
\NAT@mbox{\NAT@hyper@{{\citenumfont{\NAT@num}}}}%
\NAT@def@citea@box
\or
\NAT@hyper@citea@space{\NAT@test{\NAT@ctype}}%
\or
\NAT@hyper@citea@space{\NAT@test{\NAT@ctype}}%
\or
\NAT@hyper@citea@space\NAT@alias
\fi
\fi
}%
}%
\@ifnum{\NAT@cmprs>\z@}{\NAT@last@yr}{}%
\ifNAT@swa\else
\@ifnum{\NAT@ctype=\z@}{%
\if*#2*\else\NAT@cmt#2\fi
}{}%
\NAT@mbox{\NAT@@close}%
\fi
}{#1}{#2}%
}%
\def\NAT@citea@mbox{%
\@citea\mbox{\NAT@hyper@{{\citenumfont{\NAT@num}}}}%
}%
\def\NAT@hyper@#1{%
\hyper@natlinkstart{\@citeb\@extra@b@citeb}#1\hyper@natlinkend
}%
\def\NAT@hyper@citea#1{%
\@citea
\NAT@hyper@{#1}%
\NAT@def@citea
}%
\def\NAT@hyper@citea@space#1{%
\@citea
\NAT@hyper@{#1}%
\NAT@def@citea@space
}%
\def\def@NAT@last@yr#1{%
\protected@edef\NAT@last@yr{%
#1%
\noexpand\mbox{%
\noexpand\hyper@natlinkstart{\@citeb\@extra@b@citeb}%
{\noexpand\citenumfont{\NAT@num}}%
\noexpand\hyper@natlinkend
}%
}%
}%
\def\NAT@last@yr@mbox{%
\NAT@last@yr\let\NAT@last@yr\relax
\NAT@citea@mbox
}%
\newcommand\NAT@test[1]{%
\@ifnum{#1=\@ne}{%
\ifx\NAT@nm\NAT@noname
\begingroup\reset@font\bfseries(author?)\endgroup
\PackageWarning{natbib}{%
Author undefined for citation`\@citeb' \MessageBreak on page \thepage%
}%
\else \NAT@nm
\fi
}{%
\if\relax\NAT@date\relax
\begingroup\reset@font\bfseries(year?)\endgroup
\PackageWarning{natbib}{%
Year undefined for citation`\@citeb' \MessageBreak on page \thepage%
}%
\else \NAT@date
\fi
}%
}%
\let\citenumfont=\@empty
\newcommand\NAT@citex{}
\def\NAT@citex%
[#1][#2]#3{%
\NAT@reset@parser
\NAT@sort@cites{#3}%
\NAT@reset@citea
\@cite{\let\NAT@nm\@empty\let\NAT@year\@empty
\@for\@citeb:=\NAT@cite@list\do
{\@safe@activestrue
\edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
\@safe@activesfalse
\@ifundefined{b@\@citeb\@extra@b@citeb}{\@citea%
{\reset@font\bfseries ?}\NAT@citeundefined
\PackageWarning{natbib}%
{Citation `\@citeb' on page \thepage \space undefined}\def\NAT@date{}}%
{\let\NAT@last@nm=\NAT@nm\let\NAT@last@yr=\NAT@year
\NAT@parse{\@citeb}%
\ifNAT@longnames\@ifundefined{bv@\@citeb\@extra@b@citeb}{%
\let\NAT@name=\NAT@all@names
\global\@namedef{bv@\@citeb\@extra@b@citeb}{}}{}%
\fi
\ifNAT@full\let\NAT@nm\NAT@all@names\else
\let\NAT@nm\NAT@name\fi
\ifNAT@swa\ifcase\NAT@ctype
\if\relax\NAT@date\relax
\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}\NAT@date}%
\else
\ifx\NAT@last@nm\NAT@nm\NAT@yrsep
\ifx\NAT@last@yr\NAT@year
\def\NAT@temp{{?}}%
\ifx\NAT@temp\NAT@exlab\PackageWarningNoLine{natbib}%
{Multiple citation on page \thepage: same authors and
year\MessageBreak without distinguishing extra
letter,\MessageBreak appears as question mark}\fi
\NAT@hyper@{\NAT@exlab}%
\else\unskip\NAT@spacechar
\NAT@hyper@{\NAT@date}%
\fi
\else
\@citea\NAT@hyper@{%
\NAT@nmfmt{\NAT@nm}%
\hyper@natlinkbreak{%
\NAT@aysep\NAT@spacechar}{\@citeb\@extra@b@citeb
}%
\NAT@date
}%
\fi
\fi
\or\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
\or\@citea\NAT@hyper@{\NAT@date}%
\or\@citea\NAT@hyper@{\NAT@alias}%
\fi \NAT@def@citea
\else
\ifcase\NAT@ctype
\if\relax\NAT@date\relax
\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
\else
\ifx\NAT@last@nm\NAT@nm\NAT@yrsep
\ifx\NAT@last@yr\NAT@year
\def\NAT@temp{{?}}%
\ifx\NAT@temp\NAT@exlab\PackageWarningNoLine{natbib}%
{Multiple citation on page \thepage: same authors and
year\MessageBreak without distinguishing extra
letter,\MessageBreak appears as question mark}\fi
\NAT@hyper@{\NAT@exlab}%
\else
\unskip\NAT@spacechar
\NAT@hyper@{\NAT@date}%
\fi
\else
\@citea\NAT@hyper@{%
\NAT@nmfmt{\NAT@nm}%
\hyper@natlinkbreak{\NAT@spacechar\NAT@@open\if*#1*\else#1\NAT@spacechar\fi}%
{\@citeb\@extra@b@citeb}%
\NAT@date
}%
\fi
\fi
\or\@citea\NAT@hyper@{\NAT@nmfmt{\NAT@nm}}%
\or\@citea\NAT@hyper@{\NAT@date}%
\or\@citea\NAT@hyper@{\NAT@alias}%
\fi
\if\relax\NAT@date\relax
\NAT@def@citea
\else
\NAT@def@citea@close
\fi
\fi
}}\ifNAT@swa\else\if*#2*\else\NAT@cmt#2\fi
\if\relax\NAT@date\relax\else\NAT@@close\fi\fi}{#1}{#2}}
\def\NAT@spacechar{\ }%
\def\NAT@separator{\NAT@sep\NAT@penalty}%
\def\NAT@reset@citea{\c@NAT@ctr\@ne\let\@citea\@empty}%
\def\NAT@def@citea{\def\@citea{\NAT@separator\NAT@space}}%
\def\NAT@def@citea@space{\def\@citea{\NAT@separator\NAT@spacechar}}%
\def\NAT@def@citea@close{\def\@citea{\NAT@@close\NAT@separator\NAT@space}}%
\def\NAT@def@citea@box{\def\@citea{\NAT@mbox{\NAT@@close}\NAT@separator\NAT@spacechar}}%
\newif\ifNAT@par \NAT@partrue
\newcommand\NAT@@open{\ifNAT@par\NAT@open\fi}
\newcommand\NAT@@close{\ifNAT@par\NAT@close\fi}
\newcommand\NAT@alias{\@ifundefined{al@\@citeb\@extra@b@citeb}{%
{\reset@font\bfseries(alias?)}\PackageWarning{natbib}
{Alias undefined for citation `\@citeb'
\MessageBreak on page \thepage}}{\@nameuse{al@\@citeb\@extra@b@citeb}}}
\let\NAT@up\relax
\newcommand\NAT@Up[1]{{\let\protect\@unexpandable@protect\let~\relax
\expandafter\NAT@deftemp#1}\expandafter\NAT@UP\NAT@temp}
\newcommand\NAT@deftemp[1]{\xdef\NAT@temp{#1}}
\newcommand\NAT@UP[1]{\let\@tempa\NAT@UP\ifcat a#1\MakeUppercase{#1}%
\let\@tempa\relax\else#1\fi\@tempa}
\newcommand\shortcites[1]{%
\@bsphack\@for\@citeb:=#1\do
{\@safe@activestrue
\edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
\@safe@activesfalse
\global\@namedef{bv@\@citeb\@extra@b@citeb}{}}\@esphack}
\newcommand\NAT@biblabel[1]{\hfill}
\newcommand\NAT@biblabelnum[1]{\bibnumfmt{#1}}
\let\bibnumfmt\@empty
\providecommand\@biblabel[1]{[#1]}
\AtBeginDocument{\ifx\bibnumfmt\@empty\let\bibnumfmt\@biblabel\fi}
\newcommand\NAT@bibsetnum[1]{\settowidth\labelwidth{\@biblabel{#1}}%
\setlength{\leftmargin}{\labelwidth}\addtolength{\leftmargin}{\labelsep}%
\setlength{\itemsep}{\bibsep}\setlength{\parsep}{\z@}%
\ifNAT@openbib
\addtolength{\leftmargin}{\bibindent}%
\setlength{\itemindent}{-\bibindent}%
\setlength{\listparindent}{\itemindent}%
\setlength{\parsep}{0pt}%
\fi
}
\newlength{\bibhang}
\setlength{\bibhang}{1em}
\newlength{\bibsep}
{\@listi \global\bibsep\itemsep \global\advance\bibsep by\parsep}
\newcommand\NAT@bibsetup%
[1]{\setlength{\leftmargin}{\bibhang}\setlength{\itemindent}{-\leftmargin}%
\setlength{\itemsep}{\bibsep}\setlength{\parsep}{\z@}}
\newcommand\NAT@set@cites{%
\ifNAT@numbers
\ifNAT@super \let\@cite\NAT@citesuper
\def\NAT@mbox##1{\unskip\nobreak\textsuperscript{##1}}%
\let\citeyearpar=\citeyear
\let\NAT@space\relax
\def\NAT@super@kern{\kern\p@}%
\else
\let\NAT@mbox=\mbox
\let\@cite\NAT@citenum
\let\NAT@space\NAT@spacechar
\let\NAT@super@kern\relax
\fi
\let\@citex\NAT@citexnum
\let\@biblabel\NAT@biblabelnum
\let\@bibsetup\NAT@bibsetnum
\renewcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@num\NAT@close}%
\def\natexlab##1{}%
\def\NAT@penalty{\penalty\@m}%
\else
\let\@cite\NAT@cite
\let\@citex\NAT@citex
\let\@biblabel\NAT@biblabel
\let\@bibsetup\NAT@bibsetup
\let\NAT@space\NAT@spacechar
\let\NAT@penalty\@empty
\renewcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@date\NAT@close}%
\def\natexlab##1{##1}%
\fi}
\AtBeginDocument{\NAT@set@cites}
\AtBeginDocument{\ifx\SK@def\@undefined\else
\ifx\SK@cite\@empty\else
\SK@def\@citex[#1][#2]#3{\SK@\SK@@ref{#3}\SK@@citex[#1][#2]{#3}}\fi
\ifx\SK@citeauthor\@undefined\def\HAR@checkdef{}\else
\let\citeauthor\SK@citeauthor
\let\citefullauthor\SK@citefullauthor
\let\citeyear\SK@citeyear\fi
\fi}
\newif\ifNAT@full\NAT@fullfalse
\newif\ifNAT@swa
\DeclareRobustCommand\citet
{\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@partrue
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\newcommand\NAT@citetp{\@ifnextchar[{\NAT@@citetp}{\NAT@@citetp[]}}
\newcommand\NAT@@citetp{}
\def\NAT@@citetp[#1]{\@ifnextchar[{\@citex[#1]}{\@citex[][#1]}}
\DeclareRobustCommand\citep
{\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@partrue
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\cite
{\begingroup\let\NAT@ctype\z@\NAT@partrue\NAT@swatrue
\@ifstar{\NAT@fulltrue\NAT@cites}{\NAT@fullfalse\NAT@cites}}
\newcommand\NAT@cites{\@ifnextchar [{\NAT@@citetp}{%
\ifNAT@numbers\else
\NAT@swafalse
\fi
\NAT@@citetp[]}}
\DeclareRobustCommand\citealt
{\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@parfalse
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\citealp
{\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\citenum
{\begingroup
\NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse\let\textsuperscript\NAT@spacechar
\NAT@citexnum[][]}
\DeclareRobustCommand\citeauthor
{\begingroup\NAT@swafalse\let\NAT@ctype\@ne\NAT@parfalse
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\Citet
{\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@partrue
\let\NAT@up\NAT@Up
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\Citep
{\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@partrue
\let\NAT@up\NAT@Up
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\Citealt
{\begingroup\NAT@swafalse\let\NAT@ctype\z@\NAT@parfalse
\let\NAT@up\NAT@Up
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\Citealp
{\begingroup\NAT@swatrue\let\NAT@ctype\z@\NAT@parfalse
\let\NAT@up\NAT@Up
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\Citeauthor
{\begingroup\NAT@swafalse\let\NAT@ctype\@ne\NAT@parfalse
\let\NAT@up\NAT@Up
\@ifstar{\NAT@fulltrue\NAT@citetp}{\NAT@fullfalse\NAT@citetp}}
\DeclareRobustCommand\citeyear
{\begingroup\NAT@swafalse\let\NAT@ctype\tw@\NAT@parfalse\NAT@citetp}
\DeclareRobustCommand\citeyearpar
{\begingroup\NAT@swatrue\let\NAT@ctype\tw@\NAT@partrue\NAT@citetp}
\newcommand\citetext[1]{\NAT@open#1\NAT@close}
\DeclareRobustCommand\citefullauthor
{\citeauthor*}
\newcommand\defcitealias[2]{%
\@ifundefined{al@#1\@extra@b@citeb}{}
{\PackageWarning{natbib}{Overwriting existing alias for citation #1}}
\@namedef{al@#1\@extra@b@citeb}{#2}}
\DeclareRobustCommand\citetalias{\begingroup
\NAT@swafalse\let\NAT@ctype\thr@@\NAT@parfalse\NAT@citetp}
\DeclareRobustCommand\citepalias{\begingroup
\NAT@swatrue\let\NAT@ctype\thr@@\NAT@partrue\NAT@citetp}
\renewcommand\nocite[1]{\@bsphack
\@for\@citeb:=#1\do{%
\@safe@activestrue
\edef\@citeb{\expandafter\@firstofone\@citeb\@empty}%
\@safe@activesfalse
\if@filesw\immediate\write\@auxout{\string\citation{\@citeb}}\fi
\if*\@citeb\else
\@ifundefined{b@\@citeb\@extra@b@citeb}{%
\NAT@citeundefined \PackageWarning{natbib}%
{Citation `\@citeb' undefined}}{}\fi}%
\@esphack}
\newcommand\NAT@parse[1]{%
\begingroup
\let\protect=\@unexpandable@protect
\let~\relax
\let\active@prefix=\@gobble
\edef\NAT@temp{\csname b@#1\@extra@b@citeb\endcsname}%
\aftergroup\NAT@split
\expandafter
\endgroup
\NAT@temp{}{}{}{}{}@@%
\expandafter\NAT@parse@date\NAT@date??????@@%
\ifciteindex\NAT@index\fi
}%
\def\NAT@split#1#2#3#4#5@@{%
\gdef\NAT@num{#1}\gdef\NAT@name{#3}\gdef\NAT@date{#2}%
\gdef\NAT@all@names{#4}%
\ifx\NAT@num\@empty\gdef\NAT@num{0}\fi
\ifx\NAT@noname\NAT@all@names \gdef\NAT@all@names{#3}\fi
}%
\def\NAT@reset@parser{%
\global\let\NAT@num\@empty
\global\let\NAT@name\@empty
\global\let\NAT@date\@empty
\global\let\NAT@all@names\@empty
}%
\newcommand\NAT@parse@date{}
\def\NAT@parse@date#1#2#3#4#5#6@@{%
\ifnum\the\catcode`#1=11\def\NAT@year{}\def\NAT@exlab{#1}\else
\ifnum\the\catcode`#2=11\def\NAT@year{#1}\def\NAT@exlab{#2}\else
\ifnum\the\catcode`#3=11\def\NAT@year{#1#2}\def\NAT@exlab{#3}\else
\ifnum\the\catcode`#4=11\def\NAT@year{#1#2#3}\def\NAT@exlab{#4}\else
\def\NAT@year{#1#2#3#4}\def\NAT@exlab{{#5}}\fi\fi\fi\fi}
\newcommand\NAT@index{}
\let\NAT@makeindex=\makeindex
\renewcommand\makeindex{\NAT@makeindex
\renewcommand\NAT@index{\@bsphack\begingroup
\def~{\string~}\@wrindex{\NAT@idxtxt}}}
\newcommand\NAT@idxtxt{\NAT@name\NAT@spacechar\NAT@open\NAT@date\NAT@close}
\@ifxundefined\@indexfile{}{\let\NAT@makeindex\relax\makeindex}
\newif\ifciteindex \citeindexfalse
\newcommand\citeindextype{default}
\newcommand\NAT@index@alt{{\let\protect=\noexpand\let~\relax
\xdef\NAT@temp{\NAT@idxtxt}}\expandafter\NAT@exp\NAT@temp\@nil}
\newcommand\NAT@exp{}
\def\NAT@exp#1\@nil{\index[\citeindextype]{#1}}
\AtBeginDocument{%
\@ifpackageloaded{index}{\let\NAT@index=\NAT@index@alt}{}}
\newcommand\NAT@ifcmd{\futurelet\NAT@temp\NAT@ifxcmd}
\newcommand\NAT@ifxcmd{\ifx\NAT@temp\relax\else\expandafter\NAT@bare\fi}
\def\NAT@bare#1(#2)#3(@)#4\@nil#5{%
\if @#2
\expandafter\NAT@apalk#1, , \@nil{#5}%
\else
\NAT@wrout{\the\c@NAT@ctr}{#2}{#1}{#3}{#5}%
\fi
}
\newcommand\NAT@wrout[5]{%
\if@filesw
{\let\protect\noexpand\let~\relax
\immediate
\write\@auxout{\string\bibcite{#5}{{#1}{#2}{{#3}}{{#4}}}}}\fi
\ignorespaces}
\def\NAT@noname{{}}
\renewcommand\bibitem{\@ifnextchar[{\@lbibitem}{\@lbibitem[]}}%
\let\NAT@bibitem@first@sw\@secondoftwo
\def\@lbibitem[#1]#2{%
\if\relax\@extra@b@citeb\relax\else
\@ifundefined{br@#2\@extra@b@citeb}{}{%
\@namedef{br@#2}{\@nameuse{br@#2\@extra@b@citeb}}%
}%
\fi
\@ifundefined{b@#2\@extra@b@citeb}{%
\def\NAT@num{}%
}{%
\NAT@parse{#2}%
}%
\def\NAT@tmp{#1}%
\expandafter\let\expandafter\bibitemOpen\csname NAT@b@open@#2\endcsname
\expandafter\let\expandafter\bibitemShut\csname NAT@b@shut@#2\endcsname
\@ifnum{\NAT@merge>\@ne}{%
\NAT@bibitem@first@sw{%
\@firstoftwo
}{%
\@ifundefined{NAT@b*@#2}{%
\@firstoftwo
}{%
\expandafter\def\expandafter\NAT@num\expandafter{\the\c@NAT@ctr}%
\@secondoftwo
}%
}%
}{%
\@firstoftwo
}%
{%
\global\advance\c@NAT@ctr\@ne
\@ifx{\NAT@tmp\@empty}{\@firstoftwo}{%
\@secondoftwo
}%
{%
\expandafter\def\expandafter\NAT@num\expandafter{\the\c@NAT@ctr}%
\global\NAT@stdbsttrue
}{}%
\bibitem@fin
\item[\hfil\NAT@anchor{#2}{\NAT@num}]%
\global\let\NAT@bibitem@first@sw\@secondoftwo
\NAT@bibitem@init
}%
{%
\NAT@anchor{#2}{}%
\NAT@bibitem@cont
\bibitem@fin
}%
\@ifx{\NAT@tmp\@empty}{%
\NAT@wrout{\the\c@NAT@ctr}{}{}{}{#2}%
}{%
\expandafter\NAT@ifcmd\NAT@tmp(@)(@)\@nil{#2}%
}%
}%
\def\bibitem@fin{%
\@ifxundefined\@bibstop{}{\csname bibitem@\@bibstop\endcsname}%
}%
\def\NAT@bibitem@init{%
\let\@bibstop\@undefined
}%
\def\NAT@bibitem@cont{%
\let\bibitem@Stop\bibitemContinue
\let\bibitem@NoStop\bibitemContinue
}%
\def\BibitemOpen{%
\bibitemOpen
}%
\def\BibitemShut#1{%
\def\@bibstop{#1}%
\let\bibitem@Stop\bibitemStop
\let\bibitem@NoStop\bibitemNoStop
\@ifx{\bibitemShut\relax}{\let\@bibitemShut\@empty}{%
\expandafter\def\expandafter\@bibitemShut\expandafter{\bibitemShut}%
}%
}%
\def\@bibitemShut{}%
\def\bibitemStop{\@bibitemShut}%
\def\bibitemNoStop{%
\@ifx{\@empty\@bibitemShut}{.\spacefactor\@mmm\space}{\@bibitemShut}%
}%
\def\bibitemContinue{%
\@ifx{\@empty\@bibitemShut}{;\spacefactor\@mmm\space}{\@bibitemShut}%
}%
\mathchardef\@mmm=3000 %
\let\bibitemOpen\relax
\let\bibitemShut\relax
\@ifnum{\NAT@merge>\@ne}{%
\providecommand{\bibAnnote}[3]{%
\BibitemShut{#1}%
\def\@tempa{#3}\@ifx{\@tempa\@empty}{}{%
\begin{quotation}\noindent
\textsc{Key:}\ #2\\\textsc{Annotation:}\ \@tempa
\end{quotation}%
}%
\ignorespaces
}%
\providecommand{\bibAnnoteFile}[2]{%
\IfFileExists{#2}{%
\bibAnnote{#1}{#2}{\input{#2}}%
}{%
\bibAnnote{#1}{#2}{}%
}%
}%
}{}%
\def\bibfield{\@ifnum{\NAT@merge>\tw@}{\@bibfield}{\@secondoftwo}}%
\def\@bibfield#1#2{%
\begingroup
\let\Doi\@gobble
\let\bibinfo\relax
\let\restore@protect\@empty
\protected@edef\@tempa{#2}%
\aftergroup\def\aftergroup\@tempa
\expandafter\endgroup\expandafter{\@tempa}%
\expandafter\@ifx\expandafter{\csname @bib#1\endcsname\@tempa}{%
\expandafter\let\expandafter\@tempa\csname @bib@X#1\endcsname
}{%
\expandafter\let\csname @bib#1\endcsname\@tempa
\expandafter\let\expandafter\@tempa\csname @bib@Y#1\endcsname
}%
\@ifx{\@tempa\relax}{\let\@tempa\@firstofone}{}%
\@tempa{#2}%
}%
\def\bibinfo#1{%
\expandafter\let\expandafter\@tempa\csname bibinfo@X@#1\endcsname
\@ifx{\@tempa\relax}{\@firstofone}{\@tempa}%
}%
\def\@bib@Xauthor#1{\let\@bib@Xjournal\@gobble}%
\def\@bib@Xjournal#1{\begingroup\let\bibinfo@X@journal\@bib@Z@journal#1\endgroup}%
\def\@bibibid@#1{\textit{ibid}.}%
\appdef\NAT@bibitem@init{%
\let\@bibauthor \@empty
\let\@bibjournal \@empty
\let\@bib@Z@journal\@bibibid@
}%
\ifx\SK@lbibitem\@undefined\else
\let\SK@lbibitem\@lbibitem
\def\@lbibitem[#1]#2{%
\SK@lbibitem[#1]{#2}\SK@\SK@@label{#2}\ignorespaces}\fi
\newif\ifNAT@stdbst \NAT@stdbstfalse
\AtEndDocument{%
\ifNAT@stdbst\if@filesw
\immediate\write\@auxout{%
\string\providecommand\string\NAT@force@numbers{}%
\string\NAT@force@numbers
}%
\fi\fi
}
\newcommand\NAT@force@numbers{%
\ifNAT@numbers\else
\PackageError{natbib}{Bibliography not compatible with author-year
citations.\MessageBreak
Press <return> to continue in numerical citation style}
{Check the bibliography entries for non-compliant syntax,\MessageBreak
or select author-year BibTeX style, e.g. plainnat}%
\global\NAT@numberstrue\fi}
\providecommand\bibcite{}
\renewcommand\bibcite[2]{%
\@ifundefined{b@#1\@extra@binfo}{\relax}{%
\NAT@citemultiple
\PackageWarningNoLine{natbib}{Citation `#1' multiply defined}%
}%
\global\@namedef{b@#1\@extra@binfo}{#2}%
}%
\AtEndDocument{\NAT@swatrue\let\bibcite\NAT@testdef}
\newcommand\NAT@testdef[2]{%
\def\NAT@temp{#2}%
\expandafter \ifx \csname b@#1\@extra@binfo\endcsname\NAT@temp
\else
\ifNAT@swa \NAT@swafalse
\PackageWarningNoLine{natbib}{%
Citation(s) may have changed.\MessageBreak
Rerun to get citations correct%
}%