@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/