TY  - JOUR
AU  - A. P. Sadovskii
TI  - Center conditions and limit cycles in a cubic system of differential equations
JO  - Differencialʹnye uravneniâ
PY  - 2000
SP  - 98
EP  - 102
VL  - 36
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_2000_36_1_a13/
LA  - ru
ID  - DE_2000_36_1_a13
ER  -