\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]{Hae81} 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/}. \bibitem[Soi04]{Soi04} Leonard~H. Soicher. \newblock Computing with graphs and groups. \newblock In Lowell~W. Beineke and Robin~J. Wilson, editors, {\em Topics in Algebraic Graph Theory}, volume 102 of {\em Encyclopedia of Mathematics and its Applications}, pages 250--266. Cambridge University Press, 2004. \bibitem[Soi06]{Soi06} Leonard~H. Soicher. \newblock Is there a {M}c{L}aughlin geometry? \newblock {\em J. Algebra}, 300:248--255, 2006. \end{thebibliography}