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@article{DE_1975_11_5_a5, author = {A. M. Samoilenko}, title = {The exponential stability of an invariant torus of a dynamical system}, journal = {Differencialʹnye uravneni\^a}, pages = {820--834}, publisher = {mathdoc}, volume = {11}, number = {5}, year = {1975}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1975_11_5_a5/} }
A. M. Samoilenko. The exponential stability of an invariant torus of a dynamical system. Differencialʹnye uravneniâ, Tome 11 (1975) no. 5, pp. 820-834. http://geodesic.mathdoc.fr/item/DE_1975_11_5_a5/