\begin{thebibliography}{BCN89}

\bibitem[BCN89]{BCN89}
A.~E. Brouwer, A.~M. Cohen, and A.~Neumaier.
\newblock {\em Distance-Regular Graphs}.
\newblock Springer, Berlin, Heidelberg and New York, 1989.

\bibitem[Cam99]{Cam99}
Peter~J. Cameron.
\newblock {\em Permutation Groups}.
\newblock Cambridge University Press, 1999.
\newblock book's web-page:
  \URL{http://www.maths.qmul.ac.uk/~pjc/permgps/pgbook.html}.

\bibitem[CSS99]{CSS99}
Hans Cuypers, Leonard~H. Soicher, and Hans Sterk.
\newblock The small mathieu groups (project).
\newblock In Arjeh~M. Cohen, Hans Cuypers, and Hans Sterk, editors, {\em Some
  Tapas of Computer Algebra}, volume~4 of {\em Algorithms and Computation in
  Mathematics}, pages 323--337. Springer, Berlin, Heidelberg and New York,
  1999.

\bibitem[Hae81]{Haemers81}
Willem Haemers.
\newblock A new partial geometry constructed from the hoffman-singleton graph.
\newblock In P.~J. Cameron, J.~W.~P. Hirschfeld, and D.~R. Hughes, editors,
  {\em Finite Geometries and Designs: Proceedings of the Second Isle of Thorns
  Conference 1980}, volume~49 of {\em London Mathematical Society Lecture Note
  Series}, pages 119--127. Cambridge University Press, 1981.

\bibitem[HL99]{HL99}
Alexander Hulpke and Steve Linton.
\newblock Construction of {Co3}. {An} example of the use of an integrated
  system for {Computational} {Group} {Theory}.
\newblock In C.~M. Campbell, E.~F. Robertson, N.~Ruskuc, and G.~C. Smith,
  editors, {\em Groups St Andrews 1997 in Bath}, volume 260/261 of {\em London
  Mathematical Society Lecture Note Series}, pages 394--409. Cambridge
  University Press, 1999.

\bibitem[McK90]{Nau90}
Brendan~D. McKay.
\newblock {\em {nauty} user's guide (version 1.5), Technical report
  TR-CS-90-02}.
\newblock Australian National University, Computer Science Department, 1990.
\newblock nauty homepage: \URL{http://cs.anu.edu.au/people/bdm/nauty/}.

\bibitem[PS97]{PS97}
Cheryl~E. Praeger and Leonard~H. Soicher.
\newblock {\em Low rank representations and graphs for sporadic groups},
  volume~8 of {\em Australian Mathematical Society Lecture Series}.
\newblock Cambridge University Press, 1997.

\bibitem[Soi93]{Soi93}
Leonard~H. Soicher.
\newblock {GRAPE}: a system for computing with graphs and groups.
\newblock In Larry Finkelstein and William~M. Kantor, editors, {\em Groups and
  Computation}, volume~11 of {\em DIMACS Series in Discrete Mathematics and
  Theoretical Computer Science}, pages 287--291. American Mathematical Society,
  1993.
\newblock GRAPE homepage: \URL{http://www.maths.qmul.ac.uk/~leonard/grape/}.

\end{thebibliography}
