@article{SF_1989__39_2_134990,
     author = {P.M. Edwards},
     title = {Maximizing a congruence with respect to its partition of idempotents.},
     journal = {Semigroup forum},
     pages = {257--262},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     zbl = {0662.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134990/}
}