@article{SF_1996__52_3_135437,
     author = {K.D. jr. Magill},
     title = {Properties of a pair of functions which generate a dense subsemigroup of {S(X).}},
     journal = {Semigroup forum},
     pages = {101--104},
     publisher = {mathdoc},
     volume = {52},
     number = {3},
     year = {1996},
     zbl = {0838.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__52_3_135437/}
}