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