%0 Journal Article
%A N. A. Shirokov
%T Division by an inner function does not change the class of smoothness
%J Doklady Akademii Nauk
%D 1983
%P 821-823
%V 268
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_268_4_a11/
%G ru
%F DAN_1983_268_4_a11