%0 Journal Article %A C. Badea %T Perturbations of operators similar to contractions and the commutator equation %J Studia Mathematica %D 2002 %P 273-293 %V 150 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm150-3-5/ %R 10.4064/sm150-3-5 %G en %F 10_4064_sm150_3_5