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\usepackage{mathptmx,graphicx,textcomp,hyperref}
\usepackage[scaled=.90]{helvet}
\usepackage{courier}
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\begin{document}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{vslcrypt_c3le_1_2}}
\caption{vslcrypt-c3le-1-2 (2 von 2)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{vslcrypt_c3le_2_2}}
\caption{vslcrypt-c3le-2-2 (2 von 2)}
\end{figure}

\begin{figure}
\centering
\fbox{\includegraphics{vck_c3le_1_2}}
\caption{vck-c3le-1-2 (2 von 2)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics{vck_c3le_2_2}}
\caption{vck-c3le-2-2 (2 von 2)}
\end{figure}

\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{vslcrypt_c3le_1_3}}
\caption{vslcrypt-c3le-1-3 (2 von 3)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{vslcrypt_c3le_2_3}}
\caption{vslcrypt-c3le-2-3 (2 von 3)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{vslcrypt_c3le_3_3}}
\caption{vslcrypt-c3le-3-3 (2 von 3)}
\end{figure}

\begin{figure}
\centering
\fbox{\includegraphics{klein_analyse_sch}}
\caption{klein-analyse-sch (nach Andreas Klein, Universität Kassel)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics{klein_analyse_geh1}}
\caption{klein-analyse-geh1 (nach Andreas Klein, Universität Kassel)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics{klein_analyse_geh2}}
\caption{klein-analyse-geh2 (nach Andreas Klein, Universität Kassel)}
\end{figure}

\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{ves_s_1_3}}
\caption{ves-s-1-3 (1+2, 2+3, 1+2+3)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{ves_s_2_3}}
\caption{ves-s-2-3 (1+2, 2+3, 1+2+3)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{ves_s_3_3}}
\caption{ves-s-3-3 (1+2, 2+3, 1+2+3)}
\end{figure}

\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{ves_grau_1_2}}
\caption{ves-grau-1-2 (2 von 2)}
\end{figure}
\begin{figure}
\centering
\fbox{\includegraphics[scale=2]{ves_grau_2_2}}
\caption{ves-grau-2-2 (2 von 2)}
\end{figure}
\end{document}
