%0 Journal Article
%A V. I. Burenkov
%T On approximation of functions in Sobolev spaces by finite functions on an arbitrary open set
%J Doklady Akademii Nauk
%D 1972
%P 259-262
%V 202
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_202_2_a1/
%G ru
%F DAN_1972_202_2_a1