\addcontentsline{toc}{chapter}{References}
\begin{thebibliography}{99}
  \bibitem{example}
    \selectlanguage{german}
    F. Zirkelbach, M. H"aberlen, J. K. N. Lindner, B. Stritzker.
    \selectlanguage{english}
    {\em Modelling of a selforganization process leading to periodic arrays of nanometric amorphous precipitates by ion irradiation.}
    Comp. Mater. Sci. 33 (2005) 310.
\end{thebibliography}
