@article{SF_1978__16_134298,
     author = {C.M. Reis},
     title = {A note on homomorphisms of a free monoid.},
     journal = {Semigroup forum},
     pages = {389--391},
     publisher = {mathdoc},
     volume = {16},
     year = {1978},
     zbl = {0394.68057},
     url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134298/}
}