\documentclass[a4paper,twoside]{article}

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\usepackage[scaled]{beramono}

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\usepackage{natbib}

\usepackage{ual}

\title{Code generation for Thumb-2 processors}
\author{Camil Staps}

\begin{document}

\input{approach}
\input{differences}

\bibliographystyle{plainnat}
\bibliography{thesis}

\end{document}