@article{MAN_1917__78_158758,
     author = {G. Hessenberg},
     title = {Vektorielle {Begr\"undung} der {Differentialgeometrie}},
     journal = {Mathematische Annalen},
     pages = {187--217},
     year = {1917},
     volume = {78},
     zbl = {46.1029.04},
     url = {http://geodesic.mathdoc.fr/item/MAN_1917__78_158758/}
}