1. Atlas of Finite Groups;Conway,1985
2. Finite Groups Theory;Aschbacher,1986
3. The uniqueness of groups of Lyons type;Aschbacher;J. Amer. Math. Soc.,1992
4. Permutation Groups;Dixon,1996
5. D. Gorenstein, R. Lyons, A local characterization of large sporadic groups, unpublished manuscript, 1992