%0 Journal Article
%A V. V. Shan'kov
%T An averaging operator with variable radius and an inverse theorem
%J Doklady Akademii Nauk
%D 1983
%P 307-309
%V 273
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_273_2_a9/
%G ru
%F DAN_1983_273_2_a9