Arto Salomaa. Characteristic Words for Parikh Matrices. In Zoltán Ésik, Zoltán Fülöp, editors, Automata, Formal Languages, and Related Topics - Dedicated to Ferenc Gécseg on the occasion of his 70th birthday. pages 117-127, Institute of Informatics, University of Szeged, Hungary, 2009.
Abstract is missing.