TY  - JOUR
AU  - A. E. Rudenok
TI  - On limit cycles of a two-dimensional autonomous system with nonlinearities of third degree
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 825
EP  - 834
VL  - 23
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_5_a11/
LA  - ru
ID  - DE_1987_23_5_a11
ER  -