%0 Journal Article %A W. Żelazko %T On certain class of non-removable ideals in Banach algebras %J Studia Mathematica %D 1972 %P 87-92 %V 44 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-44-1-87-92/ %R 10.4064/sm-44-1-87-92 %G en %F 10_4064_sm_44_1_87_92