@article{JRAM_1962__210_150536,
     author = {G.J. Rieger},
     title = {\"Uber die mittlere {Anzahl} der {Primfaktoren} von p - 1.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {113--120},
     publisher = {mathdoc},
     volume = {210},
     year = {1962},
     zbl = {0273.10039},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1962__210_150536/}
}