TY  - JOUR
AU  - N. A. Il'yasov
TI  - On the equivalence of some relations in different metrics between norms, best approximations, and moduli of smoothness of periodic functions and their derivatives
JO  - Trudy Instituta matematiki i mehaniki
PY  - 2018
SP  - 176
EP  - 188
VL  - 24
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/TIMM_2018_24_4_a13/
LA  - ru
ID  - TIMM_2018_24_4_a13
ER  -