@article{JRAM_1930__163_149733,
     author = {Hertha Adelsberger},
     title = {\"Uber unendliche diskrete {Gruppen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {103--124},
     year = {1930},
     volume = {163},
     zbl = {56.0135.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1930__163_149733/}
}