TY  - JOUR
AU  - I. I. Golichev
TI  - Approximation of an element in the range of a function of an operator
JO  - Doklady Akademii Nauk
PY  - 1979
SP  - 527
EP  - 530
VL  - 245
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1979_245_3_a2/
LA  - ru
ID  - DAN_1979_245_3_a2
ER  -