@article{NUMA_1962__4_131519,
     author = {F.L. Bauer},
     title = {On the {Field} of {Values} {Subordinate} to a {Norm.}},
     journal = {Numerische Mathematik},
     pages = {103--113},
     publisher = {mathdoc},
     volume = {4},
     year = {1962},
     zbl = {0117.11004},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1962__4_131519/}
}