TY  - JOUR
AU  - V. I. Ivanov
TI  - Direct and converse theorems of the theory of approximation in the metric of $L_p$ for $0
JO  - Matematičeskie zametki
PY  - 1975
SP  - 641
EP  - 658
VL  - 18
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1975_18_5_a1/
LA  - ru
ID  - MZM_1975_18_5_a1
ER  -