@article{10_1007_s10587_014_0121_x,
     author = {Braatvedt, Gareth and Brits, Rudi},
     title = {Geometry of the spectral semidistance in {Banach} algebras},
     journal = {Czechoslovak Mathematical Journal},
     pages = {599--610},
     publisher = {mathdoc},
     volume = {64},
     number = {3},
     year = {2014},
     doi = {10.1007/s10587-014-0121-x},
     mrnumber = {3298549},
     zbl = {06391514},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10587-014-0121-x/}
}