TY  - JOUR
AU  - L. A. Cherkas
TI  - Structure of the sequence function in the neighborhood of a separatrix cycle during perturbation of an analytic autonomous system on the plane
JO  - Differencialʹnye uravneniâ
PY  - 1981
SP  - 469
EP  - 478
VL  - 17
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1981_17_3_a4/
LA  - ru
ID  - DE_1981_17_3_a4
ER  -