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@article{MZ_1959__71_169799, author = {A. Wagner}, title = {On perspectivities of finite projective planes.}, journal = {Mathematische Zeitschrift}, pages = {113--123}, publisher = {mathdoc}, volume = {71}, year = {1959}, zbl = {0085.14301}, url = {http://geodesic.mathdoc.fr/item/MZ_1959__71_169799/} }
A. Wagner. On perspectivities of finite projective planes.. Mathematische Zeitschrift, Tome 71 (1959), pp. 113-123. http://geodesic.mathdoc.fr/item/MZ_1959__71_169799/