%0 Journal Article %A A. A. Makhnev %T Graphs in which neighborhoods of vertices are isomorphic to the Hoffman--Singleton graph %J Trudy Instituta matematiki i mehaniki %D 2009 %P 143-161 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TIMM_2009_15_2_a13/ %G ru %F TIMM_2009_15_2_a13