@article{MZ_1924__20_167781,
     author = {T. Rad\`o},
     title = {\"Uber eine nicht fortsetzbare {Riemannsche} {Mannigfaltigkeit}},
     journal = {Mathematische Zeitschrift},
     pages = {1--6},
     publisher = {mathdoc},
     volume = {20},
     year = {1924},
     zbl = {50.0255.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1924__20_167781/}
}