%0 Journal Article
%A N. A. Bokaev
%T The sum of closed $U$-sets for multiplicative orthonormal systems
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1985
%P 93-96
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1985_6_a16/
%G ru
%F VMUMM_1985_6_a16