\documentclass[11pt,a4paper]{article} \usepackage{graphicx} \usepackage[english]{babel} \usepackage{amssymb} \usepackage{textcomp} \usepackage{isabelle,isabellesym,pdfsetup} \isabellestyle{it} \renewcommand{\isamarkupsubsubsection}[1]{\subsubsection*{#1}} \begin{document} \title{Fundamental Properties of Lambda-calculus} \author{Tobias Nipkow \\ Stefan Berghofer} \maketitle \tableofcontents \begin{center} \includegraphics[scale=0.7]{session_graph} \end{center} \newpage \parindent 0pt \parskip 0.5ex \input{session} \bibliographystyle{abbrv} \bibliography{root} \end{document}