TY  - JOUR
AU  - N. V. Medvedev
TI  - The method of integral equations in the problem of periodic solutions of ordinary differential equations
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1969
SP  - 28
EP  - 34
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1969_3_a3/
LA  - ru
ID  - IVM_1969_3_a3
ER  -