TY  - JOUR
AU  - L. A. Cherkas
TI  - Limit cycles of autonomous systems with phase space $\mathbf C^2$
JO  - Differencialʹnye uravneniâ
PY  - 1987
SP  - 848
EP  - 851
VL  - 23
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1987_23_5_a14/
LA  - ru
ID  - DE_1987_23_5_a14
ER  -