@article{MAN_1883__22_157092,
     author = {Klein},
     title = {Zur {Interpretation} der complexen {Elemente} in der {Geometrie.}},
     journal = {Mathematische Annalen},
     pages = {242--245},
     year = {1883},
     volume = {22},
     url = {http://geodesic.mathdoc.fr/item/MAN_1883__22_157092/}
}