TY  - JOUR
AU  - V. P. Il'in
TI  - Approximation of functions in the spaces $\widetilde W_p^{(l)}(D)$ and $W_p^{(l)}(D)$
JO  - Informatics and Automation
PY  - 1961
SP  - 61
EP  - 78
VL  - 64
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1961_64_a5/
LA  - ru
ID  - TRSPY_1961_64_a5
ER  -