@article{JRAM_1972__253_151213,
     author = {Helmut M\"aurer},
     title = {Eine {Kennzeichnung} halbovoidaler {Laguerre-Geometrien.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {203--213},
     year = {1972},
     volume = {253},
     zbl = {0237.50022},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1972__253_151213/}
}