@article{1077230457, author = {Xu, Xiaoping}, title = {Differential invariants of classical groups}, journal = {Duke Math. J.}, volume = {95}, number = {1}, year = {1998}, pages = { 543-572}, language = {en}, url = {http://dml.mathdoc.fr/item/1077230457} }
Xu, Xiaoping. Differential invariants of classical groups. Duke Math. J., Tome 95 (1998) no. 1, pp. 543-572. http://gdmltest.u-ga.fr/item/1077230457/