Decomposing a k-valued transducer into k unambiguous ones
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 30 (1996) no. 5, pp. 379-413. 
@article{ITA_1996__30_5_379_0,
     author = {Weber, Andreas},
     title = {Decomposing a $k$-valued transducer into $k$ unambiguous ones},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {379--413},
     publisher = {EDP-Sciences},
     volume = {30},
     number = {5},
     year = {1996},
     mrnumber = {1435729},
     zbl = {0867.68046},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1996__30_5_379_0/}
}
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Weber, Andreas. Decomposing a $k$-valued transducer into $k$ unambiguous ones. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 30 (1996) no. 5, pp. 379-413. http://archive.numdam.org/item/ITA_1996__30_5_379_0/

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