%&LaTeX
\documentclass{article}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{10}

\bibitem{Schoeffmann2003} Sch{\"o}ffmann, J. (2003). \textit{Zur aktuellen Situation der vier Unterarten der Weichmaulforelle, Salmo (Salmothymus) obtusirostris HECKEL 1851} (Vol. 56).

\end{thebibliography}

\end{document}

