@article{10_4064_fm_117_2_85_90,
     author = {S. Subbiah},
     title = {A dense subsemigroup of {S(R)} generated by two elements},
     journal = {Fundamenta Mathematicae},
     pages = {85--90},
     publisher = {mathdoc},
     volume = {117},
     number = {2},
     year = {1983},
     doi = {10.4064/fm-117-2-85-90},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-117-2-85-90/}
}