TY  - JOUR
AU  - I. V. Kamenev
TI  - Periodic solutions of first-order differential equations
JO  - Differencialʹnye uravneniâ
PY  - 1983
SP  - 1853
EP  - 1859
VL  - 19
IS  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1983_19_11_a2/
LA  - ru
ID  - DE_1983_19_11_a2
ER  -