@inproceedings{ GL99,
  author =           {Guralnick, R. M. and Lübeck, F.},
  booktitle =        {Proceedings of \emph{Computational 
                      Group Theory},  Columbus, Ohio, June 1999},
  title =            {On $p$-singular  elements  in  {C}hevalley  groups  in
                      characteristic $p$},
  publisher =        {de Gruyter},
  year =             {2001},
  pages =            {249--255}
}