%0 Journal Article
%A V. A. Sadovnichii
%A V. A. Lyubishkin
%A M. Martinovič
%T Finite-dimensional perturbations of discrete operators, and trace formulas
%J Doklady Akademii Nauk
%D 1987
%P 1062-1064
%V 293
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1987_293_5_a8/
%G ru
%F DAN_1987_293_5_a8