Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1961_140_2_a9, author = {V. A. Trenogin}, title = {Perturbation of a linear equation by a small nonlinear term}, journal = {Doklady Akademii Nauk}, pages = {311--313}, publisher = {mathdoc}, volume = {140}, number = {2}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_2_a9/} }
V. A. Trenogin. Perturbation of a linear equation by a small nonlinear term. Doklady Akademii Nauk, Tome 140 (1961) no. 2, pp. 311-313. http://geodesic.mathdoc.fr/item/DAN_1961_140_2_a9/