TY  - JOUR
AU  - A. I. Perov
TI  - Periodical, almost periodical and bounded solutions to differential equation $dx/dt=f(t,x)$
JO  - Doklady Akademii Nauk
PY  - 1960
SP  - 531
EP  - 534
VL  - 132
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1960_132_3_a11/
LA  - ru
ID  - DAN_1960_132_3_a11
ER  -