@article{MAN_1902__55_158035,
     author = {E. Schmidt},
     title = {Ueber die {Definition} des {Begriffs} der {L\"ange} krummer {Linien.}},
     journal = {Mathematische Annalen},
     pages = {163--176},
     publisher = {mathdoc},
     volume = {55},
     year = {1902},
     url = {http://geodesic.mathdoc.fr/item/MAN_1902__55_158035/}
}