%0 Journal Article
%A V. A. Khatskevich
%T Plus operators in normed spaces with indefinite metric
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1972
%V 27
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1972_27_5_a25/
%G ru
%F RM_1972_27_5_a25