@article{GDZPPN001249967, title = {On certain codes admitting inverse semigroups as syntactic monoids.}, journal = {Semigroup forum}, volume = {7}, year = {1974}, pages = {312-331}, zbl = {0287.20062}, url = {http://dml.mathdoc.fr/item/GDZPPN001249967} }
Lallement, G.; Keenan, M. On certain codes admitting inverse semigroups as syntactic monoids.. Semigroup forum, Tome 7 (1974) pp. 312-331. http://gdmltest.u-ga.fr/item/GDZPPN001249967/