@article{MAN_1871__3_156502,
     author = {Stahl},
     title = {Zur {Theorie} der {Kr\"ummungslinien} und der dreifachen {Orthogonalsysteme}},
     journal = {Mathematische Annalen},
     pages = {488--495},
     publisher = {mathdoc},
     volume = {3},
     year = {1871},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1871__3_156502/}
}