Kaufman (1994)[3] placed it in his Río Negro branch, but this is not followed in Aikhenvald (1999).[4] It is grouped withPasé in the Japurá-Colômbia branch by Ramirez and França (2019).[5]
^Moseley, Christopher; Asher, R. E.; Tait, Mary (1994),Atlas of the world's languages, London; New York: Routledge,ISBN978-0-415-01925-5
^Dixon, Robert M. W.; Aĭkhenvalʹd, A. I︠U︡, eds. (2006).The Amazonian languages. Cambridge language surveys (Digitally printed 1st pbk. version ed.). Cambridge; New York: Cambridge University Press.ISBN978-0-521-57893-6.
