@article{CMH_1936__9_138666,
     author = {Arnold Emch},
     title = {\"Uber eine bemerkenswerte {Klasse} von {Hyperfl\"achen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {42--50},
     publisher = {mathdoc},
     volume = {9},
     year = {1936},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1936__9_138666/}
}