References

ATLAS

J.H. Conway, R.T. Curtis, S.P. Norton, R.A. Parker and R.A. Wilson, An ATLAS of Finite Groups, Clarendon Press, Oxford, 1985.

GAP

M. Schönert, et al., GAP: Groups, Algorithms and Programming, Lehrstuhl D für Mathematik, RWTH Aachen, 1995.
Manual: http://www.math.rwth-aachen.de/LDFM/GAP/Info/manual.html.

PS97

C.E. Praeger and L.H. Soicher, Low rank representations and graphs for sporadic groups, Cambridge University Press, 1997.

So93

L.H. Soicher, GRAPE: a system for computing with graphs and groups, in Groups and Computation (L. Finkelstein and W.M. Kantor, eds.), DIMACS Series in Discrete Mathematics and Theoretical Computer Science 11, A.M.S., 1993, pp. 287-291.