TY  - JOUR
AU  - Đinh Dung
TI  - Best linear methods for approximation of classes of periodic functions of several variables
JO  - Matematičeskie zametki
PY  - 1987
SP  - 646
EP  - 653
VL  - 41
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a2/
LA  - ru
ID  - MZM_1987_41_5_a2
ER  -