@article{ITA_1999__33_2_117_0, author = {Halava, Vesa and Harju, Tero}, title = {Undecidability of the equivalence of finite substitutions on regular language}, journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications}, volume = {33}, year = {1999}, pages = {117-124}, mrnumber = {1707965}, zbl = {0946.68076}, language = {en}, url = {http://dml.mathdoc.fr/item/ITA_1999__33_2_117_0} }
Halava, Vesa; Harju, Tero. Undecidability of the equivalence of finite substitutions on regular language. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 33 (1999) pp. 117-124. http://gdmltest.u-ga.fr/item/ITA_1999__33_2_117_0/
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