%0 Journal Article
%A Yu. A. Brudnyi
%A P. A. Shvartsman
%T A linear extension operator for a space of smooth functions defined on a closed subset in $\mathbf{R}^n$
%J Doklady Akademii Nauk
%D 1985
%P 268-272
%V 280
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1985_280_2_a1/
%G ru
%F DAN_1985_280_2_a1