\documentclass[a4paper, twoside, 11pt]{scrbook}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{header}
\bibliography{references.bib}
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% DOCUMENT METADATA
\thesistype{THESISTYPE} % Master's Thesis, Bachelor's Thesis, Semester Thesis, Group Project
\title{TITLE}
\author{AUTHORNAME}
\email{AUTHORMAIL}
\institute{Laboratory for Solid State Physics \\[2pt]
Departement of Physics, D-PHYS \\[2pt]
ETH Zürich}
% Optionally, you can put in your own logo here
%\logo{\includegraphics[width=0.2\columnwidth]{figures/HyquLogo2019}}
\supervisors{Supervisor~1\\ Supervisor~2}
% Optionally, keywords and categories of the work can be shown (on the Abstract page)
%\keywords{Keywords go here.}
%\categories{ACM categories go here.}
\date{\today}
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\begin{document}
\frontmatter % do not remove this line
\maketitle
\cleardoublepage
\begin{acknowledgements}
acknowledgments(can be commented out if not needed)
\end{acknowledgements}
\begin{abstract}
ABSTRACT HERE
\end{abstract}
\tableofcontents
\mainmatter
\chapter{Introduction}
\section{Motivation}
Lorem ipsum
\chapter{Theory}
Lorem ipsum
\appendix
\chapter{Myappendix}
\backmatter
\printbibliography
%add declaration of originality if needed
%\includepdf{Appendix/DecOriginality.pdf}
\end{document}