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@article{MZ_1963__82_170188, author = {F.C. Piper}, title = {Elations of finite projective planes.}, journal = {Mathematische Zeitschrift}, pages = {247--258}, publisher = {mathdoc}, volume = {82}, year = {1963}, zbl = {0114.12603}, url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170188/} }
F.C. Piper. Elations of finite projective planes.. Mathematische Zeitschrift, Tome 82 (1963), pp. 247-258. http://geodesic.mathdoc.fr/item/MZ_1963__82_170188/