@article{GDZPPN002398753, title = {On the Orbits of Collineation Groups.}, journal = {Mathematische Zeitschrift}, volume = {99}, year = {1967}, pages = {33-49}, zbl = {0163.42304}, url = {http://dml.mathdoc.fr/item/GDZPPN002398753} }
Block, Richard E. On the Orbits of Collineation Groups.. Mathematische Zeitschrift, Tome 99 (1967) pp. 33-49. http://gdmltest.u-ga.fr/item/GDZPPN002398753/