@article{00978157,
title = {Criterion for proper actions on homogeneous spaces of reductive groups.},
journal = {Journal of Lie Theory},
volume = {6},
year = {1996},
pages = {147-163},
zbl = {0863.22010},
language = {en},
url = {http://dml.mathdoc.fr/item/00978157}
}
Kobayashi, Toshiyuki. Criterion for proper actions on homogeneous spaces of reductive groups.. Journal of Lie Theory, Tome 6 (1996) pp. 147-163. http://gdmltest.u-ga.fr/item/00978157/