@article{GDZPPN002204851,
title = {The genus of PSl2 (q).},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {59-86},
zbl = {0613.57019},
url = {http://dml.mathdoc.fr/item/GDZPPN002204851}
}
Sjerve, Denis; Glover, Henry. The genus of PSl2 (q).. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 59-86. http://gdmltest.u-ga.fr/item/GDZPPN002204851/