%0 Journal Article %A Paul R. Hafner %T On the graphs of Hoffman-Singleton and Higman-Sims %J The electronic journal of combinatorics %D 2004 %V 11 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/1830/ %R 10.37236/1830 %F 10_37236_1830