@article{AM2_1982__25_136948,
     author = {A.E. Brouwer},
     title = {Polarities of {G.} {Higman's} symmetric design and a strongly regular graph on 176 vertices.},
     journal = {Aequationes mathematicae},
     pages = {77--82},
     publisher = {mathdoc},
     volume = {25},
     year = {1982},
     zbl = {0518.05039},
     url = {http://geodesic.mathdoc.fr/item/AM2_1982__25_136948/}
}