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@article{MZ_1964__83_170238, author = {Richard Roth}, title = {Collineation groups of finite projective planes.}, journal = {Mathematische Zeitschrift}, pages = {409--421}, publisher = {mathdoc}, volume = {83}, year = {1964}, zbl = {0139.14302}, url = {http://geodesic.mathdoc.fr/item/MZ_1964__83_170238/} }
Richard Roth. Collineation groups of finite projective planes.. Mathematische Zeitschrift, Tome 83 (1964), pp. 409-421. http://geodesic.mathdoc.fr/item/MZ_1964__83_170238/