TY - JOUR AU - W. Żelazko TI - On certain class of non-removable ideals in Banach algebras JO - Studia Mathematica PY - 1972 SP - 87 EP - 92 VL - 44 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-44-1-87-92/ DO - 10.4064/sm-44-1-87-92 LA - en ID - 10_4064_sm_44_1_87_92 ER -