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@article{AM2_1969__2_182352, author = {V. HAVEL}, title = {On {Collineations} on {Three} and {Four} {Lines} in a {Projective} {Plane} {(Short} {Communication)}}, journal = {Aequationes mathematicae}, pages = {397--398}, publisher = {mathdoc}, volume = {2}, year = {1969}, url = {http://geodesic.mathdoc.fr/item/AM2_1969__2_182352/} }
V. HAVEL. On Collineations on Three and Four Lines in a Projective Plane (Short Communication). Aequationes mathematicae, Tome 2 (1969), pp. 397-398. http://geodesic.mathdoc.fr/item/AM2_1969__2_182352/