Anderson, L. 1959. "Ticuna Vowels: with Special Regard To the System of Five Tonemes." In Serie Linguistica Especial do Museu Nacional, Rio de Janeiro, 1: 79-119.
Aikhenvald, Alexandra Y. and R. M. W. Dixon. 1999. "Other Small Families and Isolates." In The Amazonian Languages, edited by Robert M.W. Dixon and Alexandra Y. Aikhenvald. 341-381. Cambridge University Press.