@article{SF_1974__7_134006,
     author = {John Rhodes},
     title = {The kernel of a homomorphism on a finite semigroup.},
     journal = {Semigroup forum},
     pages = {153--163},
     publisher = {mathdoc},
     volume = {7},
     year = {1974},
     zbl = {0301.20053},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__7_134006/}
}