@article{SF_1992__44_1_135145,
     author = {A.M. Forouzanfar},
     title = {Closed ideals in semigroups of continuous  selfmaps.},
     journal = {Semigroup forum},
     pages = {221--228},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1992},
     zbl = {0746.54016},
     url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135145/}
}