%0 Journal Article
%A V. I. Burenkov
%T The approximation of functions in the space $C^{r}(\Omega )$ by functions of compact support, for an arbitrary open set~$\Omega $
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1972
%P 62-74
%V 117
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1972_117_a4/
%G ru
%F TM_1972_117_a4