@article{JRAM_1917__147_149456,
     author = {K. Hensel},
     title = {Allgemeine {Theorie} der {Kongruenzklassengruppen} und ihrer {Invarianten} in algebraischen {K\"orpern.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {1--15},
     publisher = {mathdoc},
     volume = {147},
     year = {1917},
     zbl = {46.0251.03},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1917__147_149456/}
}