Updating dead links and also use DOI whenever possible.

chapters/literature.tex

@@ -3,7 +3,7 @@ \chapter{Literature}\doublelabel{literature}
 Benveniste A., Caspi P., Edwards S.A., Halbwachs N., Le Guernic P., and
 Simone R. (2003): \textbf{The Synchronous Languages Twelve Years Later}.
 Proc. of the IEEE, Vol., 91, No. 1.
-\href{http://www.irisa.fr/distribcom/benveniste/pub/synch_ProcIEEE_2002.pdf}{www.irisa.fr/distribcom/-benveniste/pub/synch\_ProcIEEE\_2002.pdf}
+\url{https://doi.org/10.1109/JPROC.2002.805826}
 
 Colaco J.-L., and Pouzet M. (2003): \textbf{Clocks as First Class
 Abstract Types}. In Third International Conference on Embedded Software
@@ -15,22 +15,13 @@ \chapter{Literature}\doublelabel{literature}
 Differential-Algebraic Equation Systems}. Keynote Address, Proceedings
 ESM'95, European Simulation Multiconference, Prague, Czech Republic,
 June 5-8, 1995, pp. xxiii-xxxiv.
-% A terrible hack for long links!
-\ifpdf
-\href{http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=6E666F4221CFED902DCA7BDF8DC51AB6?doi=10.1.1.127.3787\&rep=rep1\&type=pdf}
-{http://citeseerx.ist.psu.edu/viewdoc/download;}
-
-\href{http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=6E666F4221CFED902DCA7BDF8DC51AB6?doi=10.1.1.127.3787\&rep=rep1\&type=pdf}
-{jsessionid=6E666F4221CFED902DCA7BDF8DC51AB6?doi=10.1.1.127.3787\&rep=rep1\&type=pdf}
-\else
-\url{http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=6E666F4221CFED902DCA7BDF8DC51AB6?doi=10.1.1.127.3787\&rep=rep1\&type=pdf}
-\fi
+\url{http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.127.3787\&rep=rep1\&type=pdf}
 
 Forget J., F. Boniol, D. Lesens, C. Pagetti (2008): \textbf{A
 Multi-Periodic Synchronous Data-Flow Language}. In
 11\textsuperscript{th} IEEE High Assurance Systems Engineering Symposium
 (HASE'08), Dec. 3-5 2008, Nanjing, China, pp. 251-260.
-\url{http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true\&arnumber=4708883\&contentType=Conference+Publications}
+\url{https://doi.org/10.1109/HASE.2008.47}
 
 Harel, D. (1987): \textbf{Statecharts: A Visual Formalism for Complex
 Systems}\emph{.} Science of Computer Programming 8, 231-274. Department

chapters/revisions.tex

@@ -1400,7 +1400,7 @@ \subsection{Acknowledgments}\doublelabel{acknowledgments2}
   Förderkennzeichen: 01IS08002K), and the Swedish funding agency VINNOVA
   has partially funded Dynasim (2008-02291), within the ITEA2 project
   MODELISAR
-  (\url{http://www.itea2.org/public/project_leaflets/MODELISAR_profile_oct-08.pdf}).
+  (\url{https://itea3.org/project/modelisar.html}).
 \item
   The Swedish funding agency VINNOVA has partially funded Linköping
   University (PELAB) within the ITEA2 project OPENPROD
@@ -1672,13 +1672,13 @@ \subsection{Acknowledgments}\doublelabel{acknowledgments3}
   The German Ministry BMBF has partially funded ABB, DLR, Fraunhofer and
   Siemens (BMBF Förderkennzeichen: 01IS07022F) within the ITEA2 project
   EUROSYSLIB
-  (\url{http://www.itea2.org/public/project_leaflets/EUROSYSLIB_profile_oct-07.pdf}).
+  (\url{http://www.eurosyslib.com}).
 \item
   The German Ministry BMBF has partially funded ITI GmbH (BMBF
   Förderkennzeichen: 01IS08002K), and the Swedish funding agency VINNOVA
   has partially funded Dynasim (2008-02291), within the ITEA2 project
   MODELISAR
-  (\url{http://www.itea2.org/public/project_leaflets/MODELISAR_profile_oct-08.pdf}).
+  (\url{https://itea3.org/project/modelisar.html}).
 \item
   The Swedish funding agency VINNOVA has partially funded Linköping
   University (PELAB) within the project ``Safe and Secure Modeling and
@@ -2244,13 +2244,13 @@ \subsection{Main Changes in Modelica 2.0}\doublelabel{main-changes-in-modelica-2
   M. Otter, H. Olsson: New Features in Modelica 2.0. 2nd International
   Modelica Conference, March 18-19, DLR Oberpfaffenhofen, Proceedings,
   pp. 7.1 - 7.12, 2002. This paper can be downloaded from
-  \url{https://www.modelica.org/Conference2002/papers/p01\_Otter.pdf}
+  \url{https://www.modelica.org/events/Conference2002/papers/p01_Otter.pdf}
 \item
   Mattsson S. E., Elmqvist H., Otter M., and Olsson H.: Initialization
   of Hybrid Differential-Algebraic Equations in Modelica 2.0. 2nd
   International Modelica Conference, March 18-19, DLR Oberpfaffenhofen,
   Proceedings, pp. 9 - 15, 2002. This paper can be downloaded from
-  \url{https://www.modelica.org/Conference2002/papers/p02\_Mattsson.pdf}
+  \url{https://www.modelica.org/events/Conference2002/papers/p02_Mattsson.pdf}
 \end{itemize}
 
 The main changes in Modelica 2.0 are: