%0 Journal Article
%A M. A. Gol'dman
%A S. N. Krachkovskii
%T On a class of perturbations of a linear closed operator with a closed range
%J Doklady Akademii Nauk
%D 1971
%P 1243-1246
%V 197
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1971_197_6_a1/
%G ru
%F DAN_1971_197_6_a1