%0 Journal Article
%A B. S. Tsirel'son
%T On the sum of periodic functions and an extension operator continuous in measure
%J Doklady Akademii Nauk
%D 1974
%P 1001-1003
%V 216
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1974_216_5_a11/
%G ru
%F DAN_1974_216_5_a11