@article{FORUM_1992__4_6_141685,
     author = {Richard Weiss and John van Bon},
     title = {A characterization of the groups {Fi22,} {Fi23} and {F24.}},
     journal = {Forum mathematicum},
     pages = {425--432},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1992},
     zbl = {0775.20002},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141685/}
}