TY  - JOUR
AU  - M. A. Krasnosel'skii
AU  - A. I. Perov
TI  - On a certain principle of the existence of bounded, periodical and almost periodical solutions to systems of ordinary differential equations
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 235
EP  - 238
VL  - 123
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_123_2_a5/
LA  - ru
ID  - DAN_1958_123_2_a5
ER  -