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@article{DE_1985_21_8_a6, author = {G. S. Osipenko}, title = {Perturbation of invariant manifolds. {II}}, journal = {Differencialʹnye uravneni\^a}, pages = {1337--1344}, publisher = {mathdoc}, volume = {21}, number = {8}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_8_a6/} }
G. S. Osipenko. Perturbation of invariant manifolds. II. Differencialʹnye uravneniâ, Tome 21 (1985) no. 8, pp. 1337-1344. http://geodesic.mathdoc.fr/item/DE_1985_21_8_a6/