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@article{MZ_1983__182_173261, author = {Rainer L\"owen}, title = {Stable {Planes} with {Isotropic} {Points.}}, journal = {Mathematische Zeitschrift}, pages = {49--62}, publisher = {mathdoc}, volume = {182}, year = {1983}, zbl = {0506.51012}, url = {http://geodesic.mathdoc.fr/item/MZ_1983__182_173261/} }
Rainer Löwen. Stable Planes with Isotropic Points.. Mathematische Zeitschrift, Tome 182 (1983), pp. 49-62. http://geodesic.mathdoc.fr/item/MZ_1983__182_173261/