Alexander Gutkin David Gay Structural Representation and Matching of Articulatory Speech Structures based on the Evolving Transformation System (ETS) Formalism. 1684-1685 2005 conf/ijcai/2005 IJCAI http://www.ijcai.org/papers/post-0071.pdf db/conf/ijcai/ijcai2005.html#GutkinG05