The limit cycles of the equation $\ddot x+f(x,\,\dot x)\dot x+g(x)=0$
Differencialʹnye uravneniâ, Tome 8 (1972) no. 6, pp. 1095-1097
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@article{DE_1972_8_6_a15,
author = {E. D. Zhitelzeif},
title = {The limit cycles of the equation $\ddot x+f(x,\,\dot x)\dot x+g(x)=0$},
journal = {Differencialʹnye uravneni\^a},
pages = {1095--1097},
year = {1972},
volume = {8},
number = {6},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DE_1972_8_6_a15/}
}
E. D. Zhitelzeif. The limit cycles of the equation $\ddot x+f(x,\,\dot x)\dot x+g(x)=0$. Differencialʹnye uravneniâ, Tome 8 (1972) no. 6, pp. 1095-1097. http://geodesic.mathdoc.fr/item/DE_1972_8_6_a15/