@article{MAN_1922__86_158936,
     author = {E. Study},
     title = {\"Uber {S.} {Lies} {Geometrie} der {Kreise} und {Kugeln}},
     journal = {Mathematische Annalen},
     pages = {40--77},
     publisher = {mathdoc},
     volume = {86},
     year = {1922},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1922__86_158936/}
}