TY  - JOUR
AU  - V. I. Rozhkov
TI  - A certain method of investigating the periodic solutions of systems with a small parameter multiplying the derivatives
JO  - Differencialʹnye uravneniâ
PY  - 1975
SP  - 1388
EP  - 1395
VL  - 11
IS  - 8
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1975_11_8_a4/
LA  - ru
ID  - DE_1975_11_8_a4
ER  -