@article{GDZPPN002427230, title = {Stable Planes with Isotropic Points.}, journal = {Mathematische Zeitschrift}, volume = {183}, year = {1983}, pages = {49-62}, zbl = {0506.51012}, url = {http://dml.mathdoc.fr/item/GDZPPN002427230} }
Löwen, Rainer. Stable Planes with Isotropic Points.. Mathematische Zeitschrift, Tome 183 (1983) pp. 49-62. http://gdmltest.u-ga.fr/item/GDZPPN002427230/