@article{GDZPPN002229196, title = {Separeted orbits for certain non-reductive subgroups.}, journal = {Manuscripta mathematica}, volume = {61}, year = {1988}, pages = {205-218}, zbl = {0671.14023}, url = {http://dml.mathdoc.fr/item/GDZPPN002229196} }
Grosshans, Frank D. Separeted orbits for certain non-reductive subgroups.. Manuscripta mathematica, Tome 61 (1988) pp. 205-218. http://gdmltest.u-ga.fr/item/GDZPPN002229196/