Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1976_226_3_a1, author = {I. F. Dorofeev}, title = {On a singularly perturbed system}, journal = {Doklady Akademii Nauk}, pages = {500--502}, publisher = {mathdoc}, volume = {226}, number = {3}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1976_226_3_a1/} }
I. F. Dorofeev. On a singularly perturbed system. Doklady Akademii Nauk, Tome 226 (1976) no. 3, pp. 500-502. http://geodesic.mathdoc.fr/item/DAN_1976_226_3_a1/