TY  - JOUR
AU  - V. M. Lebedeva
TI  - The number of periodic solutions of a first order differential equation with polynomial right hand side
JO  - Differencialʹnye uravneniâ
PY  - 1968
SP  - 1428
EP  - 1432
VL  - 4
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1968_4_8_a7/
LA  - ru
ID  - DE_1968_4_8_a7
ER  -