@article{GDZPPN00208516X, title = {Braid group action, embedding problems and the groups PGLn(q), Pun(q2).}, journal = {Forum mathematicum}, volume = {6}, year = {1994}, pages = {513-536}, url = {http://dml.mathdoc.fr/item/GDZPPN00208516X} }
Völklein, Helmut. Braid group action, embedding problems and the groups PGLn(q), Pun(q2).. Forum mathematicum, Tome 6 (1994) pp. 513-536. http://gdmltest.u-ga.fr/item/GDZPPN00208516X/