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@article{IVM_1967_3_a6, author = {I. S. Kukles and L. V. Shakhova}, title = {On the absence of limit cycles for a~differential equation}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {46--49}, publisher = {mathdoc}, number = {3}, year = {1967}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1967_3_a6/} }
I. S. Kukles; L. V. Shakhova. On the absence of limit cycles for a~differential equation. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1967), pp. 46-49. http://geodesic.mathdoc.fr/item/IVM_1967_3_a6/