Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1969_185_3_a3, author = {Yu. V. Egorov}, title = {A priori estimates for first order differential operators}, journal = {Doklady Akademii Nauk}, pages = {507--508}, publisher = {mathdoc}, volume = {185}, number = {3}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1969_185_3_a3/} }
Yu. V. Egorov. A priori estimates for first order differential operators. Doklady Akademii Nauk, Tome 185 (1969) no. 3, pp. 507-508. http://geodesic.mathdoc.fr/item/DAN_1969_185_3_a3/