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@article{IM_1987__89_143477, author = {R.A. Wilson}, title = {Some subgroups of the {Baby} {Monster.}}, journal = {Inventiones mathematicae}, pages = {197--218}, publisher = {mathdoc}, volume = {89}, year = {1987}, zbl = {0622.20007}, url = {http://geodesic.mathdoc.fr/item/IM_1987__89_143477/} }
R.A. Wilson. Some subgroups of the Baby Monster.. Inventiones mathematicae, Tome 89 (1987), pp. 197-218. http://geodesic.mathdoc.fr/item/IM_1987__89_143477/