@article{GDZPPN001258915,
title = {A characterization of rational star languages generated by strong codes.},
journal = {Semigroup forum},
volume = {33},
year = {1986},
pages = {373-376},
zbl = {0624.20046},
url = {http://dml.mathdoc.fr/item/GDZPPN001258915}
}
Zhang, L.X. A characterization of rational star languages generated by strong codes.. Semigroup forum, Tome 33 (1986) pp. 373-376. http://gdmltest.u-ga.fr/item/GDZPPN001258915/