TY  - JOUR
AU  - V. I. Voilokov
TI  - On the question of existence of periodic solutions with an arbitrary period
JO  - Differencialʹnye uravneniâ
PY  - 1966
SP  - 422
EP  - 424
VL  - 2
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1966_2_3_a14/
LA  - ru
ID  - DE_1966_2_3_a14
ER  -