\usepackage{listings}
\usepackage{clean}
\usepackage{spl}
-\usepackage{hyperref}
+\usepackage[hidelinks]{hyperref}
\usepackage[a4paper]{geometry}
\usepackage{proof}
\usepackage{lscape}
\newpage
\begin{landscape}
-\subsection{Inference rules} \label{sec:infRules}
+\subsection{Inference rules}\label{sec:infRules}
\input{infRules.tex}
\end{landscape}