@article{GDZPPN002069393, title = {On the set of orbits for a Borel subgroup.}, journal = {Commentarii mathematici Helvetici}, volume = {70}, year = {1995}, pages = {285-309}, zbl = {0828.22016}, url = {http://dml.mathdoc.fr/item/GDZPPN002069393} }
Knop, Friedrich. On the set of orbits for a Borel subgroup.. Commentarii mathematici Helvetici, Tome 70 (1995) pp. 285-309. http://gdmltest.u-ga.fr/item/GDZPPN002069393/