@article{MAN_1923__89_158997,
     author = {O. Haupt and E. Hill},
     title = {Oszillationstheoreme oberhalb der {Stieltjesschen} {Grenze}},
     journal = {Mathematische Annalen},
     pages = {130--146},
     publisher = {mathdoc},
     volume = {89},
     year = {1923},
     zbl = {49.0317.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1923__89_158997/}
}