@article{GDZPPN00240172X,
title = {The Orbit Structure of Collineation Groups of Finite Projective Planes.},
journal = {Mathematische Zeitschrift},
volume = {105},
year = {1968},
pages = {318-332},
zbl = {0155.49202},
url = {http://dml.mathdoc.fr/item/GDZPPN00240172X}
}
Piper, Fred. The Orbit Structure of Collineation Groups of Finite Projective Planes.. Mathematische Zeitschrift, Tome 105 (1968) pp. 318-332. http://gdmltest.u-ga.fr/item/GDZPPN00240172X/