@article{PORMA_1979__38_3-4_115400,
     author = {Thomas, Gary M.},
     title = {On spectral homomorphisms and continuous functions of {Banach} algebra elements},
     journal = {Portugaliae mathematica},
     pages = {155--160},
     publisher = {mathdoc},
     volume = {38},
     number = {3-4},
     year = {1979},
     mrnumber = {0745243},
     zbl = {0548.46040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1979__38_3-4_115400/}
}