%0 Journal Article
%A V. S. Belonosov
%T Instability indices of unbounded operators
%J Doklady Akademii Nauk
%D 1983
%P 11-14
%V 273
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_273_1_a0/
%G ru
%F DAN_1983_273_1_a0