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@article{MZ_1965__89_170434, author = {F.C. Piper}, title = {Collineation groups containing elations. {I.}}, journal = {Mathematische Zeitschrift}, pages = {181--191}, publisher = {mathdoc}, volume = {89}, year = {1965}, zbl = {0189.20803}, url = {http://geodesic.mathdoc.fr/item/MZ_1965__89_170434/} }
F.C. Piper. Collineation groups containing elations. I.. Mathematische Zeitschrift, Tome 89 (1965), pp. 181-191. http://geodesic.mathdoc.fr/item/MZ_1965__89_170434/