@article{10_1017_S0017089500005565,
     author = {Byleen, Karl},
     title = {Embedding any countable semigroup in a 2-generated bisimple monoid},
     journal = {Glasgow mathematical journal},
     pages = {153--161},
     year = {1984},
     volume = {25},
     number = {2},
     doi = {10.1017/S0017089500005565},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005565/}
}