TY  - JOUR
AU  - È. Muhamadiev
TI  - On the theory of periodic solutions of systems of ordinary differential equations
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 510
EP  - 513
VL  - 194
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_194_3_a7/
LA  - ru
ID  - DAN_1970_194_3_a7
ER  -