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%%  An UIT Edition example
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%%  Example 04-23-2 on page 131.
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%%  Copyright (C) 2012 Vo\ss 
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%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
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%%  See http://www.latex-project.org/lppl.txt for details.
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\begin{document}
\begin{frame}{Bibliography -- example}
Here is a reference to the literature.~\cite{voss-mathe}
Or this one~\cite{beccardi97}, or \ldots
\end{frame}
\begin{frame}{Bibliography -- example}
\begin{thebibliography}{99}
\bibitem{beccardi97} Claudio Beccari.\newblock
Typesetting mathematics for science and technology according to iso 31/xi.\newblock
{\em TUGboat Journal}, 18(1):39--47, 1997.
\bibitem{nist}B.~N. Taylor.\newblock
{\em Guide for the Use of the International System of Units (SI) -- 10.5.4 Multiplying
    numbers}.
\newblock National Institute of Standard and Technology,
  \url{http://physics.nist.gov/Pubs/SP811/sec10.html}, 2005.
\bibitem<2->[Voß, 2009]{voss-mathe} Herbert Vo\ss.\newblock
{\em Typesetting Mathematics with \LaTeX}.\newblock UIT, Cambridge, 2010.
\end{thebibliography}
\end{frame}
\end{document}