%0 Journal Article
%A S. Ya. Havinson
%T Some problems concerning the completeness of systems
%J Doklady Akademii Nauk
%D 1961
%P 793-796
%V 137
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_137_4_a9/
%G ru
%F DAN_1961_137_4_a9