%0 Journal Article
%A H. Knörrer
%A J. Feldman
%A E. Trubowitz
%T The pertubatively stable spectrum of a periodic Schrödinger operator.
%J Inventiones mathematicae
%D 1990
%P 259-300
%V 100
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1990__100_2_143785/
%F IM_1990__100_2_143785