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@article{DE_1969_5_5_a3, author = {A. S. Gurtovnik and Yu. I. Neimark}, title = {On the question of the stability of quasiperiodic motions}, journal = {Differencialʹnye uravneni\^a}, pages = {824--832}, publisher = {mathdoc}, volume = {5}, number = {5}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_5_a3/} }
A. S. Gurtovnik; Yu. I. Neimark. On the question of the stability of quasiperiodic motions. Differencialʹnye uravneniâ, Tome 5 (1969) no. 5, pp. 824-832. http://geodesic.mathdoc.fr/item/DE_1969_5_5_a3/