TY  - JOUR
AU  - N. V. Medvedev
TI  - An existence principle for a periodic solution of a differential equation in Banach space
JO  - Matematičeskie zametki
PY  - 1968
SP  - 105
EP  - 111
VL  - 4
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/MZM_1968_4_1_a12/
LA  - ru
ID  - MZM_1968_4_1_a12
ER  -