@article{MAN_1930__102_159381,
     author = {G.T. Whyburn},
     title = {Concerning points of continuous curves defined by certain im kleinen properties},
     journal = {Mathematische Annalen},
     pages = {313--336},
     publisher = {mathdoc},
     volume = {102},
     year = {1930},
     zbl = {55.0319.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1930__102_159381/}
}