@article{SF_1989__39_2_134970,
     author = {J.E. Pin},
     title = {On a conjecture of {Rhodes.}},
     journal = {Semigroup forum},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     zbl = {0673.20034},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134970/}
}