@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/}
}