Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_227_6_a5, author = {V. R. Portnov}, title = {On the solvability of a nonlinear operator equation}, journal = {Doklady Akademii Nauk}, pages = {1301--1304}, publisher = {mathdoc}, volume = {227}, number = {6}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_227_6_a5/} }
V. R. Portnov. On the solvability of a nonlinear operator equation. Doklady Akademii Nauk, Tome 227 (1976) no. 6, pp. 1301-1304. http://geodesic.mathdoc.fr/item/DAN_1976_227_6_a5/