%0 Journal Article
%A Th. Kappeler
%T On the periodic spectrum of the 1-dimensional Schrödinger operator.
%J Commentarii mathematici Helvetici
%D 1990
%P 1-3
%V 65
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1990__65_3_140178/
%F CMH_1990__65_3_140178