TY  - JOUR
AU  - E. G. D'yakonov
TI  - On approximate methods for the solution of operator equations
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 516
EP  - 519
VL  - 198
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_198_3_a6/
LA  - ru
ID  - DAN_1971_198_3_a6
ER  -