%0 Journal Article
%A Johann Walter
%T Absolute Continuity of the Essential Spectrum of - ... + q (t) without Monotony of q.
%J Mathematische Zeitschrift
%D 1972
%P 83-94
%V 129
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1972__129_171822/
%F MZ_1972__129_171822