%0 Journal Article %A Gavin Brown %T Spectral extension and power independence in measure algebras %J Studia Mathematica %D 1981 %P 81-99 %V 70 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-70-1-81-99/ %R 10.4064/sm-70-1-81-99 %G en %F 10_4064_sm_70_1_81_99