TY  - JOUR
AU  - I. I. Ibragimov
AU  - M.-B. A. Babayev
TI  - On estimates of best approximations of a function of several variables by sums of two functions of a smaller number of variables
JO  - Doklady Akademii Nauk
PY  - 1971
SP  - 1037
EP  - 1040
VL  - 201
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1971_201_5_a6/
LA  - ru
ID  - DAN_1971_201_5_a6
ER  -