@article{ITA_1991__25_2_125_0, author = {Heuter, Uschi}, title = {First-order properties of trees, star-free expressions, and aperiodicity}, journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications}, volume = {25}, year = {1991}, pages = {125-145}, mrnumber = {1110980}, zbl = {0741.68065}, language = {en}, url = {http://dml.mathdoc.fr/item/ITA_1991__25_2_125_0} }
Heuter, Uschi. First-order properties of trees, star-free expressions, and aperiodicity. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 25 (1991) pp. 125-145. http://gdmltest.u-ga.fr/item/ITA_1991__25_2_125_0/
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