TY  - JOUR
AU  - M.-B. Babayev
TI  - Extremal properties and two-sided estimates in approximation by sums of functions of lesser number of variables
JO  - Matematičeskie zametki
PY  - 1984
SP  - 647
EP  - 659
VL  - 36
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1984_36_5_a2/
LA  - ru
ID  - MZM_1984_36_5_a2
ER  -