@article{JDM_1917__25_145474,
     author = {E. Study},
     title = {\"Uber {Lies} {Kugelgeometrie.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {96--113},
     year = {1917},
     volume = {25},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JDM_1917__25_145474/}
}