%0 Journal Article %A Andrzej Sołtysiak %T Joint spectra and multiplicative functionals %J Colloquium Mathematicum %D 1988 %P 357-366 %V 56 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-56-2-357-366/ %R 10.4064/cm-56-2-357-366 %G en %F 10_4064_cm_56_2_357_366