%0 Journal Article
%A D. I. Borisov
%A R. R. Gadyl'shin
%T On the spectrum of a~periodic operator with a~small localized perturbation
%J Izvestiya. Mathematics 
%D 2008
%P 659-688
%V 72
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_2008_72_4_a2/
%G en
%F IM2_2008_72_4_a2