%0 Journal Article
%A I. A. Sheipak
%T On~the basis properties of systems of root vectors of operators that are almost self-adjoint in Pontryagin spaces
%J Matematičeskie zametki
%D 1995
%P 937-940
%V 57
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1995_57_6_a16/
%G ru
%F MZM_1995_57_6_a16