@article{MZ_1970__118_171466,
     author = {Juan Jorge Sch\"affer},
     title = {Norms and {Determinants} of {Linear} {Mappings.}},
     journal = {Mathematische Zeitschrift},
     pages = {331--339},
     publisher = {mathdoc},
     volume = {118},
     year = {1970},
     zbl = {0195.41602},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__118_171466/}
}