@article{MAN_1912__72_158581,
     author = {G. Landsberg},
     title = {\"Uber die {Fl\"achen,} welche ein {Kurvenb\"undel} unter festem {Winkel} schneiden},
     journal = {Mathematische Annalen},
     pages = {431--434},
     publisher = {mathdoc},
     volume = {72},
     year = {1912},
     url = {http://geodesic.mathdoc.fr/item/MAN_1912__72_158581/}
}