@article{MAN_1891__38_157553,
     author = {R. von Lilienthal},
     title = {Zur {Kr\"ummungstheorie} der {Curvenschaaren}},
     journal = {Mathematische Annalen},
     pages = {429--451},
     year = {1891},
     volume = {38},
     zbl = {23.0792.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1891__38_157553/}
}