TY - JOUR AU - Heuter, Uschi TI - First-order properties of trees, star-free expressions, and aperiodicity JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications PY - 1991 SP - 125 EP - 145 VL - 25 IS - 2 PB - EDP-Sciences UR - http://www.numdam.org/item/ITA_1991__25_2_125_0/ LA - en ID - ITA_1991__25_2_125_0 ER -