@article{GDZPPN002397390, title = {On M\"obius-Planes of Even Order.}, journal = {Mathematische Zeitschrift}, volume = {93}, year = {1966}, pages = {187-193}, zbl = {0138.41601}, url = {http://dml.mathdoc.fr/item/GDZPPN002397390} }
Lüneburg, Heinz. On Möbius-Planes of Even Order.. Mathematische Zeitschrift, Tome 93 (1966) pp. 187-193. http://gdmltest.u-ga.fr/item/GDZPPN002397390/