\begin{thebibliography}{Koh05}

\bibitem[Koh05]{RCWA}
Stefan Kohl.
\newblock {\em {RCWA - Residue Class-Wise Affine Groups}}, 2005.
\newblock GAP package, available at
  http://www.gap-system.org/Packages/rcwa.html.

\bibitem[LN02]{GAPDoc}
Frank Lübeck and Max Neunhöffer.
\newblock {\em {GAPDoc (version 0.99)}}.
\newblock RWTH Aachen, 2002.
\newblock GAP package, available at
  http://www.math.rwth-aachen.de/~Frank.Luebeck.

\end{thebibliography}
