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@article{DE_1973_9_12_a2, author = {Yu. V. Malyshev}, title = {Systems with an invariant set}, journal = {Differencialʹnye uravneni\^a}, pages = {2141--2145}, publisher = {mathdoc}, volume = {9}, number = {12}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1973_9_12_a2/} }
Yu. V. Malyshev. Systems with an invariant set. Differencialʹnye uravneniâ, Tome 9 (1973) no. 12, pp. 2141-2145. http://geodesic.mathdoc.fr/item/DE_1973_9_12_a2/