Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1969_186_5_a4, author = {Yu. V. Egorov}, title = {Nondegenerate subelliptic pseudodifferential operators}, journal = {Doklady Akademii Nauk}, pages = {1006--1007}, publisher = {mathdoc}, volume = {186}, number = {5}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_186_5_a4/} }
Yu. V. Egorov. Nondegenerate subelliptic pseudodifferential operators. Doklady Akademii Nauk, Tome 186 (1969) no. 5, pp. 1006-1007. http://geodesic.mathdoc.fr/item/DAN_1969_186_5_a4/