(en) Aikhenvald, Alexandra Y., Areal Diffusion in Northwest Amazonia: The Case of Tariana, Anthropological Linguistics, 38:1, 1996.
(en) Waltz, Nathan E., Alva Wheeler, Proto-Tucanoan, dans Comparative Studies in Amerindian Languages, Esther Matteson (éditeur), Janua Linguarum, Series Practica 127, La Haye, Mouton, 1972.