%0 Journal Article
%A V. A. Chulaevskii
%T On~perturbations of a~Schr\"odinger operator with periodic potential
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1981
%P 143-144
%V 36
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1981_36_5_a7/
%G en
%F RM_1981_36_5_a7