TY  - JOUR
AU  - V. Yu. Popov
TI  - Best mean-square approximation of functions of $m$ variables
JO  - Matematičeskie zametki
PY  - 1973
SP  - 913
EP  - 924
VL  - 14
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1973_14_6_a16/
LA  - ru
ID  - MZM_1973_14_6_a16
ER  -