@article{GDZPPN002487101,
title = {Semimodularity of the Congruence Lattice on Regular ...-Semigroups.},
journal = {Monatshefte f\"ur Mathematik},
volume = {109},
year = {1990},
pages = {205-220},
zbl = {0713.20055},
url = {http://dml.mathdoc.fr/item/GDZPPN002487101}
}
Cherubini, A.; Bonzini, C. Semimodularity of the Congruence Lattice on Regular ...-Semigroups.. Monatshefte für Mathematik, Tome 109 (1990) pp. 205-220. http://gdmltest.u-ga.fr/item/GDZPPN002487101/