@article{MZ_1919__5_167552,
     author = {Hausdorff. F.},
     title = {\"Uber halbstetige {Funktionen} und deren {Verallgemeinerung}},
     journal = {Mathematische Zeitschrift},
     pages = {292--309},
     publisher = {mathdoc},
     volume = {5},
     year = {1919},
     zbl = {47.0240.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1919__5_167552/}
}