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@article{DE_1973_9_5_a3, author = {V. I. Voilokov}, title = {Autooscillations of arbitrary period}, journal = {Differencialʹnye uravneni\^a}, pages = {815--820}, publisher = {mathdoc}, volume = {9}, number = {5}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_5_a3/} }
V. I. Voilokov. Autooscillations of arbitrary period. Differencialʹnye uravneniâ, Tome 9 (1973) no. 5, pp. 815-820. http://geodesic.mathdoc.fr/item/DE_1973_9_5_a3/