%0 Journal Article %A K. Förster %A E. Liebetrau %T On semi-Fredholm operators and the conjugate of a product of operators %J Studia Mathematica %D 1976 %P 301-306 %V 59 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-59-3-301-306/ %R 10.4064/sm-59-3-301-306 %G en %F 10_4064_sm_59_3_301_306