TY  - JOUR
AU  - M. V. Dolov
TI  - Limit cycles and Darboux integrals in the case of a node
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 406
EP  - 415
VL  - 13
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_3_a2/
LA  - ru
ID  - DE_1977_13_3_a2
ER  -