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Contributors: bpiwowar, digfish
Tags: formatting, bibtex, bibliography, footnotes
Requires at least: 3.8
Tested up to: 5.1.0
Stable tag: 0.5.22 License: GPLv2 or later
License URI:

Papercite helps to format bibtex entries to display a bibliography or cite papers.

This fork adds support for textual footnotes, besides references from bibliograhic databases.


Build Status

To report bugs or request features, please go to Documentation can be found on

papercite format bibtex entries as HTML so they can be inserted in WordPress pages and posts. The input data is a bibtex file (either local or remote) and entries can be formatted by default using various predefined styles. Bibtex source file and a link to the publication are also available from the HTML.

Input: Sources files are BibTex files that can be:

  • WordPress media files (since 0.5.6)
  • Stored into a WordPress folder (with multi-site support);
  • An URL (e.g., from and;
  • A custom field when local to a post/page


  • Database backend to speed up the processing by caching the bibtex entries for big BibTeX files.
  • Fast OsBiB-based parser

Filtering and grouping:

  • Filtering on publication type and authors
  • Regular expression filtering on any type
  • Publications can be grouped and sorted in various ways


  • Access the single bibtex entry source code to enable copy&paste (toggle-enabled visualization)
  • Easy output customisation with the use of two templates: one for each entry, one for the list of entries
  • Auto-detection of PDF files based on the BibTeX key (or on the PDF entry)
  • Citation mode: use references in the text and print the citations at the end of a block, page or post
  • Form to let the user dynamically filter the entries

Documentation can be found from within WordPress plugin list (click on the documentation link). You can see the documentation of the plugin as installed on my site here.


  • B. Piwowarski (main developper)
  • Jaroslav Vítků: Filtering by author and type; form to filter publications
  • Michael Schreifels: auto-bibshow and no processing in post lists options
  • Stefan Aiche: group by year option
  • Łukasz Radliński: bug fixes & handling polish characters
  • Max Harper: patch for having good URLs
  • Martin Henze: option for highlighting name(s) of specific author(s)/editor(s)
  • Some parts of the code come from bib2html (version 0.9.3) written by Sergio Andreozzi.
  • Samuel Viana aka digfish: current mantainer


Follow these step or use the plugin installer from WordPress to install papercite:

  1. download the zip file and extract the content of the zip file into a local folder
  2. upload the folder papercite into your wp-content/plugins/ directory
  3. log in the wordpress administration page and access the Plugins menu

Then, you should activate papercite, and follow the instructions given in the documentation that you can access through the plugin list (click on the documentation link).

Frequently Asked Questions

Where is the documentation?

The documentation is now bundled with the plug-in. Go to the plug-in list page in the WordPress dashboard, and click on the documentation link.

How can I edit my bibtex files?

If your file is local to the blog installation, you have two options:

  • via FTP client with text editor
  • via Wordpress Admin interface: Manage->Files->Other Files

-- use wp-content/papercite-data/bib/mybibfile.bib as a path

Alternatively, you can maintain your updated biblilography by using systems such as and; specify the bib file using as a URL (e.g., in citeulike, you should use

How are the entries sorted?

Entries are sorted by year by default.

How can I personalize the HTML rendering?

The HTML rendering is isolated in two template files, located in the subfolders tpl (citation list rendering) and format (entry rendering).

How do I use the new textual footnotes ?

Using the new shortcode [ppcnote]. For example:

In molecular biology, the term double helix [ppcnote]usually applies to DNA[\ppcnote] 

will result in a footnote being generated after the post text. The numbering of the footnotes is separated from the one used in the citations.


1. With the bibshow & bibcite commands

With the bibshow & bibcite commands

2. With the bibtex command

With the bibtex command

3. The bibfilter command

The bibfilter command

TODO list

  • All authors appear in the bibfilter dropdown by default
  • Support the new citation styles (CSL) in XML format



  • Fixed problem with uploading .bib files to the media library was being denied for security reasons (issue #144)


  • Support for textual footnotes
  • Minor bug corrections


  • Fixed ignored limit option (issue #128)
  • More tests to cover potential future issues


  • Updated tests (docker & travis)
  • PHP fixes
  • Added support for -- and special latex commands (issue #111)
  • Added modifiers for output (html, strip, protect, sanitize)
  • SSL certificates can be ignored (issue #98)


  • Fixed yet another bug with remote URL fetching


  • Fixed a fatal error for remote URLs


  • New "show_links" option to display links with bibcite
  • New "highlight" option to highlight authors and editors
  • Bibfilter form is now using UTF-8 (issue #87)
  • Fixed formatting issues
  • Corrected warnings (undefined variables and constants)


  • Fixed a bug with bibfilter
  • Fixed handling of letter "n" with accute accent in OSBib (issue #83)


  • Improved documentation for customizing templates and CSS (issue #81)
  • Custom post/page options refactored (partial fix for issue #80)


  • Better handling of errors when retrieving remote URLs
  • Fixed warnings and issue more error messages when something goes wrong (issue #80)


  • (Bug #79) Clears the cache upon upgrading to avoid unknown class names when deserializing


  • Prevents name clash with other modules using OSBib (e.g. TeachPress). Fixes #79.


  • Handles accents with a space before the accentuated character. Fixes #70
  • Added support for Czech accents to osbib parser. Fixes #77. Thanks to mcapino.
  • Files can come from wordpress media (issue #76)
  • Improved the speed of the OSBib parser (issue #68)


  • OSBib parser is now the default
  • Handles non-standard plugin folder


  • Incompatibility with PHP version < 5.4


  • Option to add new files detectors (beyond pdf) - issue #38
  • Option to control title processing (issue #54)
  • Any field can now be used for filters (issue #62)
  • Unparseable year field causes database issues (issue #63)


  • The journal field was not parsed with OSBiB (issue #59)


  • @conference is now properly handled as @inproceedings (issue #53)
  • Option to limit the number of papers output by bibtex (issue #50)
  • More accents handled (issue #51)
  • Added support for interactive filtering by means of new command (bibfilter). Thanks to Jaroslav Vítků
  • Added support for these additional filtering commands to bibtex command (author and type)
  • Added two new options: auto-bibshow and skip display in post lists (thanks to Michael Schreifels)
  • Fixed quite a few PHP warnings


  • Fixed bug #48 (URL as source not working anymore with PHP < 5.4)


  • Fix problems with ignored booktitle in books (harvard and ieee styles) - fixes issue #45
  • Fix for newlines by L. Murray (issues #26 and #35)
  • Handles for URL types (issue #41, A. Dyck)


  • Maintenance mode plugins support (bug #39)
  • Support for PHP 5.4 (bug #37)
  • Improved accent support - bug #36 (josemmoya)


  • Fixes fatal error in PHP 5.4 (bug #37)
  • Improved accent support - bug #36 (josemmoya)


  • Post/page BibTeX entries from custom fields
  • Bug fixes and information for database backend


  • Optional database backend
  • New style "plain" (thanks to Andrius Velykis)
  • New template "av-bibtex" (thanks to Andrius Velykis)
  • Improved compatibility with the highlight plugin (thanks to Andrius Velykis)


  • Fixed issue #26 (newlines stripped from bibtex)
  • Fixed bug #32 (thanks to petrosb)


  • OSBib now returns a correct entry type (closes #28)


  • Improved parsing for the OSBib parser (closes #29, #27)
  • Handles properly authors initials : closes #31 (thanks to petrosb)


  • Enhancement #25 (display the bibliography at the end if no bibshow is given)


  • Fixed a small bug in the OSBiB parser


  • Updated the documentation about how papercite searches for PDFs
  • Added the OSBiB bibtex parser which should be much fadster than the previous (pear) one (note that it is not actived by default for the moment, so you should go to the plugin preferences page to set it as your bibtex parser).


  • Corrected "Bootitle" to "booktitle" in all formats (thanks to Enkerli@github)
  • Corrected a numbering bug that skipped numbers from 1 to 20 (issue #11)


  • The HTML code produced has been cleaned up (valid HTML) [bug 28]


  • Enhancement (bug 26): several bibtex files can be given
  • New (optional) bibtex parser handles larger bibtex files (bug 23)
  • Master thesis is now properly handled (bug 27)


  • Fix missing <?php (bug 24 and 25)


  • Fix a bug introduced in 0.3.10


  • Multiple authors in bibcite (enhancement #2)
  • Ignores @comment entries generated by jabref (bug 22)
  • Updated the documentation (for the new entry formats, and the extensions to bib2tpl)


  • Adopted patch given in bug 18 (bibtex source formatting)
  • Fixed function name conflict with Simple Google Analytics plug-in (bug 19)


  • Fixed bug 14 (group_order not working)
  • Used the proposed enhancement (bug 13) of the function _e2mn (parsing a month)
  • Improved bibtex parsing (&)
  • Improved the entry templates
  • Now uses OSBib for pages formatting


  • Improved the OSBib conversion for entry format - now close to perfect


  • Bug fix when there are only two authors in the entry
  • Bug fix on nested conditions in templates


  • Author are formatted according to the entry template converted from OSBib


  • Formats are back, translated from OSBib (not perfect, but close to the output in version prior to 0.3.0
  • More latex accents handled


  • Fixed bug 7: umlaut (still) not handled
  • Fixed bug 12: bug with remote URLs


  • Entry format is now in XML to ease the edition


  • Fixed bug 7: umlaut not handled
  • Fixed bug 9: template option does nothing for bibshow
  • Bug fix on sort options
  • Sort by author now working


  • Complete code overhaul - switched to a new bibtex / template system
  • New options to sort & group entries
  • Preference system to set defaults
  • New template based system for entry customisation
  • Multi-site support


  • Grouped by year option (patch due to S. Aiche)
  • Now generates an id which does not depend on the key (fix javascript related bugs)


  • bug fix: wrong mappings from bibtex fields to arrays have been corrected, link to pdf is now working properly, polish characters are almost properly handled (thanks to Łukasz Radliński)


  • bug fix: name clash was preventing insertion of medias using the WP dialogs


  • papercite now looks in the pdf directory at two levels (wp-content, and wp-content/plugins)


  • Small bug fix (removes a warning)


  • Documentation update
  • New parameter format

= 0.2.5 =

  • Fixed a bug with the allow filter


  • Small bug fixes (if the file is an URL) and use of WP functions to retrieve remote data (useful when you have proxies)


  • Fixed a bug introduced in 0.2.2
  • Changed the default folder for data in order to avoid data loss when upgrading
  • Finished the encapsulation of all the code, so as to prevent name clash with wordpress and/or other plugins


  • Removed PHP 5 specific code


  • Added the template file


  • Added deny/allow parameters to [bibtex] so the plugin can replace bib2html


  • Adapted the plugin from bib2html 0.9.3
  • Added the bibshow and bibcite commands

Upgrade Notice


The upgrade is not required. Just some minor corrections from minor glitches that were causing PHP warnings were cleaned.


Update to this version for those having troubles after updating to 0.5.7 or 0.5.8 (or clear the cache)


If you have problems with CPU usage or time to display a page, try this version and choose the OSBiB parser in the plugin preferences (in the WP administration page)


If you have custom templates, please read. The template generation has been slightly modified - you have to explicitely markup paragraphs and line breaks, since papercite now removes any \n or \r in the templates to avoid clashes with WordPress.


Bug fixes and new experimental parser (disabled by default) to handle bibtex files faster (useful for large bibtex files)


Should be the last stable release before the 0.4.0 and CoINS support


Compatibility with version prior to 0.3.0 is now almost completed. Users who want to use the new grouping, sorting or template functionalities are advised to upgrade to this version.


Complete overhaul of the bibtex/template system, with a lot of new options. Please wait until version 0.3.1 if you want to be sure of a bug free papercite (it should not break WordPress though). Please note that there is only one citation format (IEEE) and that is only a partial implementation.


Removed a PHP warning with bibshow


Introduced the format parameter to format the entries


Bug fix - all users should upgrade


Users using remote URLs for their bibliography should upgrade


All users must upgrade to this version - Please read the information about the new location of bibtex and pdfs.


Users using PHP 4 should upgrade


All users should upgrade - plugin was broken until now


All bib2html users should at least use this version so they don't break their installation


First version


hacked fork of papercite for integration with leed's wordpress omnishambles







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