%0 Journal Article %A Jaroslav Zemánek %T Spectral characterization of two-sided ideals in Banach algebras %J Studia Mathematica %D 1980 %P 1-12 %V 67 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-67-1-1-12/ %R 10.4064/sm-67-1-1-12 %G en %F 10_4064_sm_67_1_1_12