TY  - JOUR
AU  - L. I. Zhilevich
TI  - On the existence of a limit cycle in an autonomous system
JO  - Differencialʹnye uravneniâ
PY  - 1994
SP  - 377
EP  - 380
VL  - 30
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1994_30_3_a1/
LA  - ru
ID  - DE_1994_30_3_a1
ER  -