TY  - JOUR
AU  - S. N. Kudryavtsev
TI  - Extension of Functions from Isotropic Nikol'skii--Besov Spaces and Their Approximation together with Derivatives
JO  - Matematičeskie zametki
PY  - 2020
SP  - 714
EP  - 724
VL  - 108
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2020_108_5_a6/
LA  - ru
ID  - MZM_2020_108_5_a6
ER  -