\begin{thebibliography}{OVL05}

\bibitem[O'B90]{OBrien90}
Eamonn O'Brien.
\newblock The $p$-group generation algorithm.
\newblock {\em J. Symbolic Computation}, 9:677--698, 1990.

\bibitem[OVL05]{OVL05}
Eamonn~A. O'Brien and Michael~R. Vaughan-Lee.
\newblock The groups with order {$p\sp 7$} for odd prime {$p$}.
\newblock {\em J. Algebra}, 292(1):243--258, 2005.

\end{thebibliography}
