%0 Journal Article %A Albert Schneider %A Frank Mantlik %T Note on the absolutely continuous spectrum of Sturm-Liouville operators. %J Mathematische Zeitschrift %D 1990 %P 491-498 %V 205 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1990__205_3_174190/ %F MZ_1990__205_3_174190