TY  - JOUR
AU  - V. R. Portnov
TI  - Normal solvability of an abstract nonlinear problem. Applications to the solution of boundary value problems for partial differential equations
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 1028
EP  - 1031
VL  - 196
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_196_5_a8/
LA  - ru
ID  - DAN_1971_196_5_a8
ER  -