\documentclass[oneside,a4paper,11.5pt]{article}
\input{tex/00_preambule.tex}
\begin{document}
\pagestyle{empty}
\pagestyle{plain}
\linespread{1.3}
\selectfont
\newpage
\pagenumbering{roman}
%\tableofcontents
\newpage
\pagenumbering{arabic}
%CHOOSE TYPE OF YOUR PAPER AND CONTINUE IN THE *.TEX FOR THE SELECTED TYPE. YOU CAN DELETE THE OTHER TYPE'S TEMPLATE.
%RESEARCH
\include{tex/research}
%CASE STUDY
\include{tex/case_study}
\end{document}