@article{GDZPPN001248146,
title = {Finiteness of lattices of congruences on commutative semigroups.},
journal = {Semigroup forum},
volume = {4},
year = {1972},
pages = {73-77},
zbl = {0261.20052},
url = {http://dml.mathdoc.fr/item/GDZPPN001248146}
}
Tamura, T.; Nordahl, T.E. Finiteness of lattices of congruences on commutative semigroups.. Semigroup forum, Tome 4 (1972) pp. 73-77. http://gdmltest.u-ga.fr/item/GDZPPN001248146/