@article{MAN_1925__94_159100,
     author = {H. Friesecke},
     title = {Vektor\"ubertragung, {Richtungs\"ubertragung,} {Metrik}},
     journal = {Mathematische Annalen},
     pages = {101--118},
     publisher = {mathdoc},
     volume = {94},
     year = {1925},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1925__94_159100/}
}