%0 Journal Article %A Graham Allan %A Allan Sinclair %T Power factorization in Banach algebras with a bounded approximate identity %J Studia Mathematica %D 1976 %P 31-38 %V 56 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-56-1-31-38/ %R 10.4064/sm-56-1-31-38 %G en %F 10_4064_sm_56_1_31_38