@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/