TY - JOUR AU - Heil, Erhard TI - On an oscillation criterion of Hartman, Wintner and Potter JO - Archivum mathematicum PY - 1979 SP - 81 EP - 91 VL - 15 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_1979__15_2_a1/ LA - en ID - ARM_1979__15_2_a1 ER -