%0 Journal Article %A Christoph Schmoeger %T The stability radius of an operator of Saphar type %J Studia Mathematica %D 1995 %P 169-175 %V 113 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-113-2-169-175/ %R 10.4064/sm-113-2-169-175 %G en %F 10_4064_sm_113_2_169_175