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@article{MZ_1968__108_171113, author = {Ferdinand D. Veldkamp}, title = {Unitary {Groups} in {Hjelmslev-Moufang} {Planes.}}, journal = {Mathematische Zeitschrift}, pages = {288--312}, publisher = {mathdoc}, volume = {108}, year = {1968}, zbl = {0174.23601}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__108_171113/} }
Ferdinand D. Veldkamp. Unitary Groups in Hjelmslev-Moufang Planes.. Mathematische Zeitschrift, Tome 108 (1968), pp. 288-312. http://geodesic.mathdoc.fr/item/MZ_1968__108_171113/