%0 Journal Article %A Heil, Erhard %T On an oscillation criterion of Hartman, Wintner and Potter %J Archivum mathematicum %D 1979 %P 81-91 %V 15 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1979__15_2_a1/ %G en %F ARM_1979__15_2_a1