%0 Journal Article
%A M. Sh. Birman
%A M. Z. Solomyak
%T Approximation of functions of the $W_p^\alpha$-classes by piece-wise-polynomial functions
%J Doklady Akademii Nauk
%D 1966
%P 1015-1018
%V 171
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_171_5_a0/
%G ru
%F DAN_1966_171_5_a0