TY  - JOUR
AU  - V. R. Portnov
TI  - On the solvability of a nonlinear operator equation
JO  - Doklady Akademii Nauk
PY  - 1976
SP  - 1301
EP  - 1304
VL  - 227
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1976_227_6_a5/
LA  - ru
ID  - DAN_1976_227_6_a5
ER  -