@article{JRAM_1976__0283_0284_151724,
     author = {Dennis A. Garbanati},
     title = {Units with norm - 1 and signatures of units.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {164--175},
     publisher = {mathdoc},
     volume = {0283_0284},
     year = {1976},
     zbl = {0355.12004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1976__0283_0284_151724/}
}