%0 Journal Article %A Vladimir Rakočević %T Semi-Browder operators and perturbations %J Studia Mathematica %D 1997 %P 131-137 %V 122 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-122-2-131-137/ %R 10.4064/sm-122-2-131-137 %G en %F 10_4064_sm_122_2_131_137