\documentclass[11pt,a4paper]{article}
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% this should be the last package used
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\begin{document}
\title{Concrete Semantics}
\author{Tobias Nipkow \& Gerwin Klein}
\maketitle
\setcounter{tocdepth}{2}
\tableofcontents
\newpage
% generated text of all theories
\input{session}
\nocite{Nipkow}
\nocite{ConcreteSemantics}
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\end{document}