@article{GDZPPN00124874X, title = {Maximal ideal complements which are subsemigroups.}, journal = {Semigroup forum}, volume = {4}, year = {1972}, pages = {174-175}, zbl = {0263.20035}, url = {http://dml.mathdoc.fr/item/GDZPPN00124874X} }
Propes, J.C. Maximal ideal complements which are subsemigroups.. Semigroup forum, Tome 4 (1972) pp. 174-175. http://gdmltest.u-ga.fr/item/GDZPPN00124874X/