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@article{SF_1994__48_3_135321, author = {G. Thierrin and M. Ito and S.S. Yu}, title = {Right k-dense languages.}, journal = {Semigroup forum}, pages = {313--326}, publisher = {mathdoc}, volume = {48}, number = {3}, year = {1994}, url = {http://geodesic.mathdoc.fr/item/SF_1994__48_3_135321/} }
G. Thierrin; M. Ito; S.S. Yu. Right k-dense languages.. Semigroup forum, Tome 48 (1994) no. 3, pp. 313-326. http://geodesic.mathdoc.fr/item/SF_1994__48_3_135321/