Endangered Languages Catalogue Project. Compiled by research teams at University of Hawai'i Mānoa and Institute for Language Information and Technology (LINGUIST List) at Eastern Michigan University . (2012) ·

Ethnologue: Languages of the World, 16th Edition (2009) . (2009) · edited by M. Paul Lewis · SIL International http://www.ethnologue.com/

Language endangerment in South America: The clock is ticking ( pp. 167-234 ) . Crevels, Mily (2012) · In The Indigenous Languages of South America: A Comprehensive Guide edited by Lyle Campbell and Veronica Grondona · Mouton de Gruyter

"Documentation of the Mayoruna languages of western Amazonia: A compilation of recordings of oral history narratives and other speech genres" HRELP Abstract . Fleck, David (2010) · http://www.hrelp.org/grants/projects/index.php?projid=202

Atlas of the World’s Languages in Danger . Christopher Moseley (ed.) (2010) · UNESCO Publishing http://www.unesco.org/culture/en/endangeredlanguages/atlas

A survey of the languages of the Javari river valley, Brazil . Stan Anonby and David J. Holbrook (2010) ·

A Grammar of Kulina . Dienst, Stefan (2014) · Mouton Grammar Library · De Gruyter Mouton