@article{JAC_2003__18_1_a4,
     author = {Hafner, Paul R.},
     title = {The {Hoffman-Singleton} graph and its automorphisms},
     journal = {Journal of Algebraic Combinatorics},
     pages = {7--12},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2003__18_1_a4/}
}