%0 Journal Article
%A V. V. Dubrovskii
%A A. V. Nagornyi
%T On an estimate for the difference of spectral functions of discrete operators in $L^2$
%J Vestnik Moskovskogo universiteta. Matematika, mehanika
%D 1988
%P 44-47
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VMUMM_1988_5_a9/
%G ru
%F VMUMM_1988_5_a9