@article{GDZPPN002354195,
title = {Operators with thin spectral sets.},
journal = {Mathematica Scandinavica},
volume = {38},
year = {1976},
pages = {367-370},
zbl = {0349.47020},
url = {http://dml.mathdoc.fr/item/GDZPPN002354195}
}
Hirschfeld, Rudolf A. Operators with thin spectral sets.. Mathematica Scandinavica, Tome 38 (1976) pp. 367-370. http://gdmltest.u-ga.fr/item/GDZPPN002354195/