@article{GDZPPN00210203X, title = {Inequalities defining orbit spaces.}, journal = {Inventiones mathematicae}, volume = {82}, year = {1985}, pages = {539-554}, zbl = {0578.14010}, url = {http://dml.mathdoc.fr/item/GDZPPN00210203X} }
Procesi, Claudio; Schwarz, Gerald. Inequalities defining orbit spaces.. Inventiones mathematicae, Tome 82 (1985) pp. 539-554. http://gdmltest.u-ga.fr/item/GDZPPN00210203X/