Storch, Anne. 2009. "Negation in Jukun." In Negation Patterns in West African Languages and Beyond, edited by Norbert Ebermann Cyffer and Georg Erwin ziegelmeyer. 107-120. John Benjamins.

Lovestrand, Joseph. 2011. "The Dialects of Baraïn (East Chadic)." In SIL Electronic Working Papers 2011, 011: 28. Online: http://www.sil.org/silewp/abstract.asp?ref=2011-011.

Lushootseed language. http://en.wikipedia.org/wiki/Lushootseed.

Akkala Sami language. http://en.wikipedia.org/wiki/Akkala_Sami.

Plains Indian Sign Language. //en.wikipedia.org/wiki/Plains_Indian_Sign_Language.

Campbell, Lyle, Luís Díaz, and Fernando Ángel. In preparation. Nivaclé (Chulupí) Grammar.

Dimmendaal, Gerrit J. and F. K. Erhard Voeltz. 2007. "Africa." In Encyclopedia of the World's Endangered Languages, edited by Christopher Moseley. Routledge.

Anderson, Gregory and K. David Harrison. 2007. "Northern and Central Australia Language Hotspot." Online: http://www.livingtongues.org/hotspots/hotspot.australia.html.

Malvern, Jack. 2011. "Last Few Speakers of Indonesian Language Dusner Nearly Wiped Out By Flood, Volcano." In The Australian, Online: http://www.theaustralian.com.au/news/health-science/last-few-speakers-o….

http://www.tandfonline.com/doi/pdf/10.1080/07268600802308741