@article{JRAM_1968__229_150843,
     author = {Klaus Barner},
     title = {\"Uber die quatern\"are {Einheitsform} in total reellen algebraischen {Zahlk\"orpern.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {194--208},
     publisher = {mathdoc},
     volume = {229},
     year = {1968},
     zbl = {0159.07301},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1968__229_150843/}
}