TY  - JOUR
AU  - M. Sh. Birman
AU  - M. Z. Solomyak
TI  - Approximation of functions of the $W_p^\alpha$-classes by piece-wise-polynomial functions
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 1015
EP  - 1018
VL  - 171
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_171_5_a0/
LA  - ru
ID  - DAN_1966_171_5_a0
ER  -