%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Hemke+Stoeckel1985} Hemke, E., \& St{\"o}ckel, G. (1985). \textit{{\"U}ber die Flu{\ss}krebse (Astacidae) im Kreis Neustrelitz} (Vol. 4).

\end{thebibliography}

\end{document}

