TY  - JOUR
AU  - G. S. Rychkov
TI  - Uniqueness of the limit cycle of the equation $(y-P_3(x))dy=P_1(x,y)dx$ in the presence of three singular points
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 904
EP  - 905
VL  - 19
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_5_a18/
LA  - ru
ID  - DE_1983_19_5_a18
ER  -