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@article{SF_1986__33_134790, author = {H.J. Shyr}, title = {Characterizations of right dense languages.}, journal = {Semigroup forum}, pages = {23--30}, publisher = {mathdoc}, volume = {33}, year = {1986}, zbl = {0581.20066}, url = {http://geodesic.mathdoc.fr/item/SF_1986__33_134790/} }
H.J. Shyr. Characterizations of right dense languages.. Semigroup forum, Tome 33 (1986), pp. 23-30. http://geodesic.mathdoc.fr/item/SF_1986__33_134790/