%0 Journal Article %A Kluvánek, Igor %T Characterization of scalar-type spectral operators %J Archivum mathematicum %D 1966 %P 153-156 %V 02 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ARM_1966__2_4_a1/ %G en %F ARM_1966__2_4_a1