@article{GDZPPN002488701, title = {Two Congruence Lattices of Completely Simple Semigroups.}, journal = {Monatshefte f\"ur Mathematik}, volume = {116}, year = {1993}, pages = {287-298}, zbl = {0811.20055}, url = {http://dml.mathdoc.fr/item/GDZPPN002488701} }
Petrich, Mario. Two Congruence Lattices of Completely Simple Semigroups.. Monatshefte für Mathematik, Tome 116 (1993) pp. 287-298. http://gdmltest.u-ga.fr/item/GDZPPN002488701/