TY  - JOUR
AU  - N. P. Kuptsov
TI  - Direct and inverse approximation theorems in Banach spaces and Fourier transforms
JO  - Matematičeskie zametki
PY  - 1970
SP  - 765
EP  - 778
VL  - 7
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1970_7_6_a12/
LA  - ru
ID  - MZM_1970_7_6_a12
ER  -