@article{MAN_1913__73_158606,
     author = {R.G.D. Richardson},
     title = {\"Uber die notwendigen und hinreichenden {Bedingungen} f\"ur das {Bestehen} eines {Kleinschen} {Oszillationstheorems.} {(Mit} 6 {Figuren} im {Text)}},
     journal = {Mathematische Annalen},
     pages = {289--304},
     publisher = {mathdoc},
     volume = {73},
     year = {1913},
     zbl = {44.0377.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1913__73_158606/}
}