@article{JRAM_1879__86_148388,
     author = {W. Killing},
     title = {Ueber zwei {Raumformen} mit constanter positiver {Kr\"ummung.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {72--83},
     publisher = {mathdoc},
     volume = {86},
     year = {1879},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1879__86_148388/}
}