%0 Journal Article
%A M. Sh. Birman
%T The discrete spectrum in gaps of the perturbed periodic Schr\"odinger operator.~II. Nonregular perturbations
%J Algebra i analiz
%D 1997
%P 62-89
%V 9
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AA_1997_9_6_a2/
%G ru
%F AA_1997_9_6_a2