%0 Journal Article
%A V. A. Sadovnichii
%A V. A. Lyubishkin
%T Some questions of the theory of perturbations of linear operators
%J Differencialʹnye uravneniâ
%D 1981
%P 1911-1914
%V 17
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1981_17_10_a19/
%G ru
%F DE_1981_17_10_a19