%0 Journal Article
%A V. I. Matsaev
%T Volterra operators obtained from self-adjoint operators by perturbation
%J Doklady Akademii Nauk
%D 1961
%P 810-813
%V 139
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1961_139_4_a9/
%G ru
%F DAN_1961_139_4_a9