@article{JRAM_1929__161_149703,
     author = {N. Tschebotar\"ow},
     title = {Zur {Gruppentheorie} des {Klassenk\"orpers.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {179--193},
     publisher = {mathdoc},
     volume = {161},
     year = {1929},
     zbl = {55.0698.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1929__161_149703/}
}