@article{GDZPPN002403684, title = {Collineation Groups in Hjelmslev-Moufang Planes.}, journal = {Mathematische Zeitschrift}, volume = {105}, year = {1968}, pages = {37-52}, zbl = {0165.54601}, url = {http://dml.mathdoc.fr/item/GDZPPN002403684} }
Veldkamp, Ferdinand D. Collineation Groups in Hjelmslev-Moufang Planes.. Mathematische Zeitschrift, Tome 105 (1968) pp. 37-52. http://gdmltest.u-ga.fr/item/GDZPPN002403684/