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@article{DE_1977_13_4_a22, author = {E. D. Zhitelzeif}, title = {Limit cycles of a system of relay type with polynomial right-hand side}, journal = {Differencialʹnye uravneni\^a}, pages = {753--755}, publisher = {mathdoc}, volume = {13}, number = {4}, year = {1977}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1977_13_4_a22/} }
E. D. Zhitelzeif. Limit cycles of a system of relay type with polynomial right-hand side. Differencialʹnye uravneniâ, Tome 13 (1977) no. 4, pp. 753-755. http://geodesic.mathdoc.fr/item/DE_1977_13_4_a22/