%0 Journal Article
%A V. I. Burenkov
%T The density of infinitely differentiable functions in Sobolev spaces for an arbitrary open set
%J Informatics and Automation
%D 1974
%P 39-50
%V 131
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1974_131_a4/
%G ru
%F TRSPY_1974_131_a4