%0 Journal Article %A Earl Berkson %A T. A. Gillespie %T The spectral decomposition of weighted shifts and the $A^p$ condition %J Colloquium Mathematicum %D 1990 %P 507-518 %V 60 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-60-61-2-507-518/ %R 10.4064/cm-60-61-2-507-518 %G en %F 10_4064_cm_60_61_2_507_518