%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Ruoss2006} Ruoss, B. (2006). Transmodulationsblockade. \textit{Schweizerische {\"A}rztezeitung}, \textit{2006}(22; 05/2006), 972--973.

\end{thebibliography}

\end{document}

