TY  - JOUR
AU  - M. V. Dolov
TI  - Limit cycles and algebraic integrals in the case of a center
JO  - Differencialʹnye uravneniâ
PY  - 1975
SP  - 1935
EP  - 1941
VL  - 11
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1975_11_11_a2/
LA  - ru
ID  - DE_1975_11_11_a2
ER  -