Conditions for the center for certain equations of the form $yy'=P(x)+Q(x)y+R(x)y^2$
Differencialʹnye uravneniâ, Tome 8 (1972) no. 8, pp. 1435-1439
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@article{DE_1972_8_8_a12,
author = {L. A. Cherkas},
title = {Conditions for the center for certain equations of the form $yy'=P(x)+Q(x)y+R(x)y^2$},
journal = {Differencialʹnye uravneni\^a},
pages = {1435--1439},
year = {1972},
volume = {8},
number = {8},
language = {ru},
url = {http://geodesic.mathdoc.fr/item/DE_1972_8_8_a12/}
}
L. A. Cherkas. Conditions for the center for certain equations of the form $yy'=P(x)+Q(x)y+R(x)y^2$. Differencialʹnye uravneniâ, Tome 8 (1972) no. 8, pp. 1435-1439. http://geodesic.mathdoc.fr/item/DE_1972_8_8_a12/