%0 Journal Article
%A D. D. Sokolov
%T On some properties of an indefinite metric
%J Sbornik. Mathematics
%D 1971
%P 1-6
%V 15
%N 1
%U http://geodesic.mathdoc.fr/item/SM_1971_15_1_a0/
%G en
%F SM_1971_15_1_a0