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@article{DE_2003_39_3_a20, author = {V. V. Filippov}, title = {A {Remark} on the {Existence} of a {Periodic} {Solution}}, journal = {Differencialʹnye uravneni\^a}, pages = {425--427}, publisher = {mathdoc}, volume = {39}, number = {3}, year = {2003}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2003_39_3_a20/} }
V. V. Filippov. A Remark on the Existence of a Periodic Solution. Differencialʹnye uravneniâ, Tome 39 (2003) no. 3, pp. 425-427. http://geodesic.mathdoc.fr/item/DE_2003_39_3_a20/