@article{MZ_1926__24_174995,
     author = {Ph. Furtw\"angler},
     title = {\"Uber die linearen {Mannigfaltigkeiten} auf {Hyperfl\"achen} zweiter {Ordnung}},
     journal = {Mathematische Zeitschrift},
     pages = {396--400},
     year = {1926},
     volume = {24},
     zbl = {51.0533.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1926__24_174995/}
}