@article{MAN_1989__285_1_164598, author = {Toshiyuki Kobayashi}, title = {Proper action on a homogeneous space of reductive type.}, journal = {Mathematische Annalen}, pages = {249--264}, year = {1989}, volume = {285}, number = {1}, zbl = {0662.22008}, url = {http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164598/} }