%0 Journal Article %A Arworn, Sr. %A Denecke, Klaus %T Tree transformations defined by hypersubstitutions %J Discussiones Mathematicae. General Algebra and Applications %D 2001 %P 219-227 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGAA_2001_21_2_a6/ %G en %F DMGAA_2001_21_2_a6