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/

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

An Atlas of Nigerian Languages ( pp. 111 ) . Roger Blench (2012) · http://www.rogerblench.info/Language/Africa/Nigeria/Atlas%20of%20Nigerian%20Languages-%20ed%20III.pdf

Les Zaars et leurs voisins ( pp. 639-657 ) . Bernard Caron (2005) · In XIIIe colloque international du Réseau Méga-Tchad edited by Henry Tourneux and Noé Woïn · https://hal.archives-ouvertes.fr/file/index/docid/643986/filename/Caron2009_Les_Zaar_et_leurs_voisins.pdf

Endangered Languages in West Africa ( pp. 140-162 ch. 7 ) . Roger Blench (2007) · In Language Diversity Endangered Trends in Linguistics, Studies and Monographs · edited by Matthias Brenzinger · Mouton de Gruyter

International Encyclopedia of Linguistics . (2003) · edited by Frawley, William · Oxford University Press

Number in South-Bauchi West Languages (Chadic, Nigeria) . Bernard Caron (2011) ·

South-Bauchi West Pronominal and TAM Systems ( pp. 93-112 ) . Bernard Caron (2006) · In Sprachbund in the West African Sahel Afrique et Langage · Vol. 11 · edited by Bernard Caron and Peter Zima · https://halshs.archives-ouvertes.fr/halshs-00644372/document

Tonal Inversion in Geji and Pelu . Bernard Caron (2011) · https://halshs.archives-ouvertes.fr/halshs-00647257v1/document

The Dyarim language of Central Nigeria and its affinities . Roger Blench (2005) ·

The Southern Bauchi group of Chadic languages: a survey report . Kiyoshi Shimizu (1978) · Africana Marburgensia.