TY  - JOUR
AU  - V. V. Arestov
TI  - Approximation of linear operators, and related extremal problems
JO  - Informatics and Automation
PY  - 1975
SP  - 29
EP  - 42
VL  - 138
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1975_138_a1/
LA  - ru
ID  - TRSPY_1975_138_a1
ER  -