TY  - JOUR
AU  - V. G. Compel
TI  - Sufficient conditions for the center for a two-dimensional autonomous system whose right-hand sides are polynomials of the third degree
JO  - Differencialʹnye uravneniâ
PY  - 1988
SP  - 1636
EP  - 1637
VL  - 24
IS  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1988_24_9_a21/
LA  - ru
ID  - DE_1988_24_9_a21
ER  -