TY  - JOUR
AU  - G. S. Rychkov
TI  - A complete investigation of the number of limit cycles of the equation $(b_{10}x+y)dy=\sum_{i+j\ge1}^2a_{ij}x^iy^jdx$
JO  - Differencialʹnye uravneniâ
PY  - 1970
SP  - 2193
EP  - 2199
VL  - 6
IS  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1970_6_12_a7/
LA  - ru
ID  - DE_1970_6_12_a7
ER  -