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@article{DE_1985_21_8_a22, author = {A. \`E. Malevich}, title = {Periodic orbits of multidimensional dynamical systems}, journal = {Differencialʹnye uravneni\^a}, pages = {1446--1449}, publisher = {mathdoc}, volume = {21}, number = {8}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1985_21_8_a22/} }
A. È. Malevich. Periodic orbits of multidimensional dynamical systems. Differencialʹnye uravneniâ, Tome 21 (1985) no. 8, pp. 1446-1449. http://geodesic.mathdoc.fr/item/DE_1985_21_8_a22/