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@article{MZ_1986__193_173780, author = {C.Y. Ho}, title = {Involutory {Collineations} of {Finite} {Planes.}}, journal = {Mathematische Zeitschrift}, pages = {235--240}, publisher = {mathdoc}, volume = {193}, year = {1986}, zbl = {0599.51010}, url = {http://geodesic.mathdoc.fr/item/MZ_1986__193_173780/} }
C.Y. Ho. Involutory Collineations of Finite Planes.. Mathematische Zeitschrift, Tome 193 (1986), pp. 235-240. http://geodesic.mathdoc.fr/item/MZ_1986__193_173780/