TY  - JOUR
AU  - V. R. Portnov
TI  - On the solvability of nonlinear operator equations in Banach spaces
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 52
EP  - 55
VL  - 225
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_225_1_a12/
LA  - ru
ID  - DAN_1975_225_1_a12
ER  -