The Blue Bird of Ergativity, Scott Delancey, University of Oregon, 2005. (pp. 1-15 in F. Qeixalos, ed., Ergativity in Amazonia III. Proceedings of the Workshop on "Ergatividade na Amazônia", Centre d'Études des Langues Indigènes d'Amérique (CELIA), Centre National de la Recherche Scientifique, Paris.)
