TY  - JOUR
AU  - M.-B. A. Babaev
TI  - Extremal elements and the value of the best approximation of a monotone function on $R^n$ by sums of functions of fewer variables
JO  - Doklady Akademii Nauk
PY  - 1982
SP  - 11
EP  - 13
VL  - 265
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1982_265_1_a0/
LA  - ru
ID  - DAN_1982_265_1_a0
ER  -