%0 Journal Article %A Bruce A. Barnes %T Perturbation theory relative to a Banach algebra of operators %J Studia Mathematica %D 1993 %P 153-174 %V 106 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-106-2-153-174/ %R 10.4064/sm-106-2-153-174 %G en %F 10_4064_sm_106_2_153_174