@article{TIMM_2009_15_2_a13,
     author = {A. A. Makhnev},
     title = {Graphs in which neighborhoods of vertices are isomorphic to the {Hoffman--Singleton} graph},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {143--161},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2009_15_2_a13/}
}