@article{10_4064_sm_67_1_1_12,
     author = {Jaroslav Zem\'anek},
     title = {Spectral characterization of two-sided ideals in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {1--12},
     year = {1980},
     volume = {67},
     number = {1},
     doi = {10.4064/sm-67-1-1-12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-67-1-1-12/}
}