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/

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

An Atlas of Nigerian Languages . Roger Blench (2011) · Mallam Dendo http://www.rogerblench.info/Language/Africa/Nigeria/Atlas%%20of%%20Nigerian%%20Languages-%%20ed%%20III.pdf

Are the African Pygmies an Ethnographic Fiction? ( pp. 41-60 ) . Roger Blench (1999) · In Central African Hunter-Gatherers in a Multidisciplinary Perspective: Challenging Elusiveness edited by Karen Biesboruck and Stefan Elders and Gerda Rossel · Netherlands: Research School of Asian, African and Amerindian Studies (CNWS), Universiteit Leiden

An Index of Nigerian Languages . (1992) · edited by D. H. Crozier and Roger M. Blench · Kwara State: Department of Linguistics and Nigerian Languages, University of Ilorin, Ilorin

Jalaa - An Almost Forgotten Language of Northeastern Nigeria: A Language Isolate ( pp. 239-271 ) . Ulrich Kleinewillinghöfer (2001) · In Historical Language Contact in Africa Sprache und Geschichte in Afrika · Vol. 16/17 · edited by Derek Nurse · Köln: Rüdiger Köppe

An index of Nigerian languages . Crozier, David Henry and Blench, Roger M. (1992) · Language Development Centre, Nigerian Educational Research and Development Council (NERDC); Dept. of Linguistics and Nigerian Languages, Univ. of Ilorin; Summer Inst. of Linguistics (SIL)

Jalaa - an almost forgotten language of north-eastern Nigeria: a language isolate? ( pp. 239-272 ) . Kleinewillinghöfer, Ulrich (2001) · Sprache und Geschichte in Afrika (SUGIA). 16/17