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) ·

Endangered Languages in Central Africa ( pp. 163-178 ) . Bruce Connell (2007) · In Language Diversity Endangered edited by Matthias Brenzinger · Mouton de Gruyter

Africa ( ch. 7 ) . Gerrit J. Dimmendaal and F. K. Erhard Voeltz (2007) · In Encyclopedia of the World's Endangered Languages edited by Christopher Moseley · Routledge

Learning the World's Languages Before They Vanish ( pp. 1156-1159 ) . Bernice Wuethrich (2000) · Science. 288 (5469) · http://www.jstor.org/stable/3075227?origin=JSTOR-pdf

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

World Oral Literature Project . http://www.oralliterature.org

From the edge: aspects of the phonetics of Cambap ( pp. 179ff ) . Connell, Bruce A. (2002) · Studies in African linguistics. 31 (1/2) ·

Moribund Languages of the Nigeria-Cameroon Borderland ( pp. 207-225 ) . Bruce Connell (1998) · In Endangered Languages in Africa edited by Matthias Brenzinger · Köppe Verlag

A Comparative Survey of Mambila Dialects . Bruce Connell (1996) · http://lucy.ukc.ac.uk/VIMS/connell/project.html