TY  - JOUR
AU  - A. M. Krasnosel'skii
TI  - On forced periodic oscillations in the nonlinear systems
JO  - Doklady Akademii Nauk
PY  - 1984
SP  - 1356
EP  - 1359
VL  - 276
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1984_276_6_a18/
LA  - ru
ID  - DAN_1984_276_6_a18
ER  -