Voir la notice de l'article provenant de la source European Digital Mathematics Library
@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/} }
A.E. Brouwer. Polarities of G. Higman's symmetric design and a strongly regular graph on 176 vertices.. Aequationes mathematicae, Tome 25 (1982), pp. 77-82. http://geodesic.mathdoc.fr/item/AM2_1982__25_136948/