@article{GDZPPN001263390, title = {Right k-dense languages.}, journal = {Semigroup forum}, volume = {48}, year = {1994}, pages = {313-326}, url = {http://dml.mathdoc.fr/item/GDZPPN001263390} }
Thierrin, G.; Ito, M.; Yu, S.S. Right k-dense languages.. Semigroup forum, Tome 48 (1994) pp. 313-326. http://gdmltest.u-ga.fr/item/GDZPPN001263390/