TY  - JOUR
AU  - A. T. Turaev
TI  - Certain methods of obtaining criteria for the existence and nonexistence of periodic solutions of a~differential equation
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1966
SP  - 129
EP  - 133
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1966_4_a18/
LA  - ru
ID  - IVM_1966_4_a18
ER  -