%0 Journal Article
%A V. R. Ol'shevskii
%T Change of Jordan structure of $G$-selfadjoint operators and selfadjoinl operator-functions under small perturbatios
%J Izvestiya. Mathematics 
%D 1991
%P 371-395
%V 37
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1991_37_2_a5/
%G en
%F IM2_1991_37_2_a5