TY  - JOUR
AU  - A. A. Samodurov
TI  - Problem of the center and the integrating factor for a Li\'enard equation
JO  - Differencialʹnye uravneniâ
PY  - 1981
SP  - 936
EP  - 940
VL  - 17
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1981_17_5_a23/
LA  - ru
ID  - DE_1981_17_5_a23
ER  -