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

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

Ethnologue: Languages of the World, 18th Edition . (2015) · edited by Lewis, M. Paul, Gary F. Simons, and Charles D. Fennig · SIL International http://www.ethnologue.com

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

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) ·

A linguist's field notes . Bernard Caron (2003) ·