@article{JRAM_1961__208_150503,
     author = {L. Danzer},
     title = {\"Uber {Durchschnittseigenschaften} n-dimensionaler {Kugelfamilien.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {181--203},
     publisher = {mathdoc},
     volume = {208},
     year = {1961},
     zbl = {0109.14904},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1961__208_150503/}
}