@article{SF_1990__41_2_135049,
     author = {D. Davenport},
     title = {The minimal ideal of compact subsemigroups of {\ss} {S.}},
     journal = {Semigroup forum},
     pages = {201--214},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {1990},
     zbl = {0842.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1990__41_2_135049/}
}