@article{GDZPPN002403951, title = {Unitary Groups in Hjelmslev-Moufang Planes.}, journal = {Mathematische Zeitschrift}, volume = {105}, year = {1968}, pages = {288-312}, zbl = {0174.23601}, url = {http://dml.mathdoc.fr/item/GDZPPN002403951} }
Veldkamp, Ferdinand D. Unitary Groups in Hjelmslev-Moufang Planes.. Mathematische Zeitschrift, Tome 105 (1968) pp. 288-312. http://gdmltest.u-ga.fr/item/GDZPPN002403951/