@article{GDZPPN002023830, title = {On Collineations on Three and on Four Lines in a Projective Plane.}, journal = {Aequationes mathematicae}, volume = {5}, year = {1970}, pages = {51-55}, zbl = {0193.21203}, url = {http://dml.mathdoc.fr/item/GDZPPN002023830} }
Havel, Václav. On Collineations on Three and on Four Lines in a Projective Plane.. Aequationes mathematicae, Tome 5 (1970) pp. 51-55. http://gdmltest.u-ga.fr/item/GDZPPN002023830/