@article{10_4064_sm_109_1_91_100,
     author = {B. Aupetit and H. du T Mouton},
     title = {Spectrum preserving linear mappings in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {91--100},
     publisher = {mathdoc},
     volume = {109},
     number = {1},
     year = {1994},
     doi = {10.4064/sm-109-1-91-100},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-109-1-91-100/}
}