@article{GDZPPN002411679, title = {Groups with a Steinberg Character.}, journal = {Mathematische Zeitschrift}, volume = {129}, year = {1972}, pages = {297-304}, zbl = {0232.20011}, url = {http://dml.mathdoc.fr/item/GDZPPN002411679} }
Richen, Forrest A. Groups with a Steinberg Character.. Mathematische Zeitschrift, Tome 129 (1972) pp. 297-304. http://gdmltest.u-ga.fr/item/GDZPPN002411679/