@article{MAN_1882__20_157039, author = {Lie}, title = {Untersuchungen \"uber geod\"atische {Curven}}, journal = {Mathematische Annalen}, pages = {357--454}, publisher = {mathdoc}, volume = {20}, year = {1882}, url = {http://geodesic.mathdoc.fr/item/MAN_1882__20_157039/} }