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@article{DE_1984_20_12_a1, author = {I. M. Burkin and G. A. Leonov}, title = {Existence of periodic solutions to a third-order nonlinear system}, journal = {Differencialʹnye uravneni\^a}, pages = {2036--2042}, publisher = {mathdoc}, volume = {20}, number = {12}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1984_20_12_a1/} }
I. M. Burkin; G. A. Leonov. Existence of periodic solutions to a third-order nonlinear system. Differencialʹnye uravneniâ, Tome 20 (1984) no. 12, pp. 2036-2042. http://geodesic.mathdoc.fr/item/DE_1984_20_12_a1/