TY  - JOUR
AU  - V. I. Ivanov
TI  - Direct and inverse theorems in approximation theory for periodic functions in S.\,B.~Stechkins papers and the development of these theorems
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2010
SP  - 5
EP  - 17
VL  - 16
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TIMM_2010_16_4_a0/
LA  - ru
ID  - TIMM_2010_16_4_a0
ER  -