A semigroup characterization of dot-depth one languages
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 17 (1983) no. 4, p. 321-330
@article{ITA_1983__17_4_321_0,
     author = {Knast, Robert},
     title = {A semigroup characterization of dot-depth one languages},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     publisher = {EDP-Sciences},
     volume = {17},
     number = {4},
     year = {1983},
     pages = {321-330},
     zbl = {0522.68063},
     mrnumber = {743892},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1983__17_4_321_0}
}
Knast, Robert. A semigroup characterization of dot-depth one languages. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 17 (1983) no. 4, pp. 321-330. http://www.numdam.org/item/ITA_1983__17_4_321_0/

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