@article{JRAM_1973__259_151307,
     author = {Klaus Kopfermann},
     title = {Ultraprodukte endlicher {K\"orper.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {211--218},
     publisher = {mathdoc},
     volume = {259},
     year = {1973},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__259_151307/}
}