@article{SF_1985__32_134783,
     author = {R.P. Sullivan},
     title = {Monomorphisms of transformation semigroups.},
     journal = {Semigroup forum},
     pages = {233--240},
     publisher = {mathdoc},
     volume = {32},
     year = {1985},
     zbl = {0579.20066},
     url = {http://geodesic.mathdoc.fr/item/SF_1985__32_134783/}
}