Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_1_a14, author = {Pham Ngoc Thao}, title = {Natural differential operators on compact manifolds}, journal = {Differencialʹnye uravneni\^a}, pages = {186--198}, publisher = {mathdoc}, volume = {5}, number = {1}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_1_a14/} }
Pham Ngoc Thao. Natural differential operators on compact manifolds. Differencialʹnye uravneniâ, Tome 5 (1969) no. 1, pp. 186-198. http://geodesic.mathdoc.fr/item/DE_1969_5_1_a14/