@article{GDZPPN002108526, title = {Syst\`eme sous-elliptiques II.}, journal = {Inventiones mathematicae}, volume = {104}, year = {1991}, pages = {377-400}, zbl = {0771.35086}, url = {http://dml.mathdoc.fr/item/GDZPPN002108526} }
Nourrigat, J. Système sous-elliptiques II.. Inventiones mathematicae, Tome 104 (1991) pp. 377-400. http://gdmltest.u-ga.fr/item/GDZPPN002108526/