@article{GDZPPN002393883, title = {Collineation groups of finite projective planes.}, journal = {Mathematische Zeitschrift}, volume = {85}, year = {1964}, pages = {409-421}, zbl = {0139.14302}, url = {http://dml.mathdoc.fr/item/GDZPPN002393883} }
Roth, Richard. Collineation groups of finite projective planes.. Mathematische Zeitschrift, Tome 85 (1964) pp. 409-421. http://gdmltest.u-ga.fr/item/GDZPPN002393883/