@article{MAN_1905__61_158237,
     author = {Otto Staude},
     title = {Das {Hauptachsenproblem} der {Fl\"achen} 2. {Ordnung}},
     journal = {Mathematische Annalen},
     pages = {392--396},
     publisher = {mathdoc},
     volume = {61},
     year = {1905},
     zbl = {36.0703.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1905__61_158237/}
}