Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1967_175_6_a4, author = {I. M. Lavrent'ev}, title = {Solvability of nonlinear equations}, journal = {Doklady Akademii Nauk}, pages = {1219--1221}, publisher = {mathdoc}, volume = {175}, number = {6}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1967_175_6_a4/} }
I. M. Lavrent'ev. Solvability of nonlinear equations. Doklady Akademii Nauk, Tome 175 (1967) no. 6, pp. 1219-1221. http://geodesic.mathdoc.fr/item/DAN_1967_175_6_a4/