TY  - JOUR
AU  - V. I. Berdyshev
TI  - Operator of best approximation on finite-dimensional subspaces
JO  - Matematičeskie zametki
PY  - 1974
SP  - 501
EP  - 511
VL  - 16
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1974_16_3_a18/
LA  - ru
ID  - MZM_1974_16_3_a18
ER  -