@article{SF_1983__26_134591,
     author = {H. Mitsch},
     title = {Semigroups and their lattice of congruences.},
     journal = {Semigroup forum},
     pages = {1--64},
     year = {1983},
     volume = {26},
     zbl = {0513.20047},
     url = {http://geodesic.mathdoc.fr/item/SF_1983__26_134591/}
}