Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1999__49_5_a3, author = {Chao, Dao Qui and Krupka, Demeter}, title = {3rd order differential invariants of coframes}, journal = {Mathematica slovaca}, pages = {563--576}, publisher = {mathdoc}, volume = {49}, number = {5}, year = {1999}, mrnumber = {1746900}, zbl = {0962.53012}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1999__49_5_a3/} }
Chao, Dao Qui; Krupka, Demeter. 3rd order differential invariants of coframes. Mathematica slovaca, Tome 49 (1999) no. 5, pp. 563-576. http://geodesic.mathdoc.fr/item/MASLO_1999__49_5_a3/