Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1972_8_12_a26, author = {L. A. Cherkas and L. I. Zhilevich}, title = {The absence of limit cycles of a certain differential equation}, journal = {Differencialʹnye uravneni\^a}, pages = {2271--2273}, publisher = {mathdoc}, volume = {8}, number = {12}, year = {1972}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1972_8_12_a26/} }
L. A. Cherkas; L. I. Zhilevich. The absence of limit cycles of a certain differential equation. Differencialʹnye uravneniâ, Tome 8 (1972) no. 12, pp. 2271-2273. http://geodesic.mathdoc.fr/item/DE_1972_8_12_a26/