@article{ELMA_1965__20_140806,
     author = {H. Zeitler},
     title = {Eine regul\"are {Horosph\"aren\"uberdeckung} des hyperbolischen {Raumes.}},
     journal = {Elemente der Mathematik},
     pages = {73--79},
     publisher = {mathdoc},
     volume = {20},
     year = {1965},
     zbl = {0129.37503},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1965__20_140806/}
}