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@article{DAN_1974_214_4_a1, author = {V. S. Afraimovich and L. P. Shilnikov}, title = {On small periodic perturbations of autonomous systems}, journal = {Doklady Akademii Nauk}, pages = {739--742}, publisher = {mathdoc}, volume = {214}, number = {4}, year = {1974}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1974_214_4_a1/} }
V. S. Afraimovich; L. P. Shilnikov. On small periodic perturbations of autonomous systems. Doklady Akademii Nauk, Tome 214 (1974) no. 4, pp. 739-742. http://geodesic.mathdoc.fr/item/DAN_1974_214_4_a1/