TY - JOUR AU - Arworn, Sr. AU - Denecke, Klaus TI - Tree transformations defined by hypersubstitutions JO - Discussiones Mathematicae. General Algebra and Applications PY - 2001 SP - 219 EP - 227 VL - 21 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMGAA_2001_21_2_a6/ LA - en ID - DMGAA_2001_21_2_a6 ER -