@article{CMUC_1980__21_3_a1,
     author = {Murphy, Gerald J. and West, T. T.},
     title = {Removing the interior of the spectrum},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {421--431},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1980},
     mrnumber = {590123},
     zbl = {0462.46035},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1980__21_3_a1/}
}