@article{10_4064_sm203_3_3,
     author = {Rudi Brits},
     title = {Perturbation and spectral discontinuity in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {253--263},
     publisher = {mathdoc},
     volume = {203},
     number = {3},
     year = {2011},
     doi = {10.4064/sm203-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm203-3-3/}
}