@article{MZ_1977__154_172512,
     author = {Olga Taussky},
     title = {Norms from {Quadratic} {Fields} and {Their} {Relation} to {Noncommuting} 2 x 2 {Matrices} {III.} {A} {Link} between the 4-rank of the {Ideal} {Class} {Groups} in...(..m) and in ...(...-m).},
     journal = {Mathematische Zeitschrift},
     pages = {91--96},
     publisher = {mathdoc},
     volume = {154},
     year = {1977},
     zbl = {0336.12002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__154_172512/}
}