%0 Journal Article
%A A. S. Andreev
%T Estimates of the spectrum of compact pseudodifferential operators in unbounded domains
%J Sbornik. Mathematics
%D 1991
%P 431-443
%V 70
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1991_70_2_a6/
%G en
%F SM_1991_70_2_a6