TY  - JOUR
AU  - L. A. Cherkas
AU  - L. I. Zhilevich
TI  - The absence of limit cycles of a certain differential equation
JO  - Differencialʹnye uravneniâ
PY  - 1972
SP  - 2271
EP  - 2273
VL  - 8
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1972_8_12_a26/
LA  - ru
ID  - DE_1972_8_12_a26
ER  -