@article{MZ_1931__33_168292,
     author = {H., Freudenthal},
     title = {\"Uber die {Enden} topologischer {B\"aume} und {Gruppen}},
     journal = {Mathematische Zeitschrift},
     pages = {692--713},
     publisher = {mathdoc},
     volume = {33},
     year = {1931},
     zbl = {57.0731.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1931__33_168292/}
}