@article{10_4064_sm_44_1_87_92,
     author = {W. \.Zelazko},
     title = {On certain class of non-removable ideals in {Banach} algebras},
     journal = {Studia Mathematica},
     pages = {87--92},
     year = {1972},
     volume = {44},
     number = {1},
     doi = {10.4064/sm-44-1-87-92},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-44-1-87-92/}
}