TY  - JOUR
AU  - P. E. Sobolevskii
TI  - On second-order differential equations in a Banach space
JO  - Doklady Akademii Nauk
PY  - 1962
SP  - 774
EP  - 777
VL  - 146
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1962_146_4_a9/
LA  - ru
ID  - DAN_1962_146_4_a9
ER  -