@article{JRAM_1952__190_150217,
     author = {Wolfgang Krull},
     title = {\"Uber geschlossene {Bewertungssysteme.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {75--92},
     publisher = {mathdoc},
     volume = {190},
     year = {1952},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1952__190_150217/}
}