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@article{DE_1978_14_4_a8, author = {Yu. V. Churin}, title = {An example of nonsimple vanishing of a periodic solution}, journal = {Differencialʹnye uravneni\^a}, pages = {652--660}, publisher = {mathdoc}, volume = {14}, number = {4}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1978_14_4_a8/} }
Yu. V. Churin. An example of nonsimple vanishing of a periodic solution. Differencialʹnye uravneniâ, Tome 14 (1978) no. 4, pp. 652-660. http://geodesic.mathdoc.fr/item/DE_1978_14_4_a8/