@article{GDZPPN001265369, title = {Semigroups and their lattice of congruences II.}, journal = {Semigroup forum}, volume = {54}, year = {1997}, pages = {1-42}, zbl = {0872.20052}, url = {http://dml.mathdoc.fr/item/GDZPPN001265369} }
Mitsch, H. Semigroups and their lattice of congruences II.. Semigroup forum, Tome 54 (1997) pp. 1-42. http://gdmltest.u-ga.fr/item/GDZPPN001265369/