%&LaTeX
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{5}

\bibitem{Boehm1911} B{\"o}hm, T. (1911). Handbuch der Holzkonstruktionen.

\end{thebibliography}

\end{document}

