@article{MAN_1893__42_157663,
     author = {R. von Lilienthal},
     title = {Ueber geod\"atische {Kr\"ummung}},
     journal = {Mathematische Annalen},
     pages = {505--525},
     publisher = {mathdoc},
     volume = {42},
     year = {1893},
     zbl = {25.1193.01},
     url = {http://geodesic.mathdoc.fr/item/MAN_1893__42_157663/}
}