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

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

A computational analysis of Gabon varieties ( pp. 3-17 ) . Bart Alewijnse and John Nerbonne and Lolke J. van der Veen and Franz Manni (2007) · In Proceedings of the RANLP (Recent Advances in Natural Language Processing) workshop on computational phonology edited by Osenova, Petya and others · http://www.ddl.ish-lyon.cnrs.fr/fulltext/Van%%20Der%%20Veen/Alewijnse_2007.pdf

B.20 Kele group: B.21 Sekiyani, B.22a West Kele, B.22b Ngom, B.24 Wumbwu, B.25 Kota (Shake, Mahongwe) ( pp. 34-35 ) . Guthrie, Malcolm (1971) · In Comparative Bantu Gregg International

Les classes nominales dans les langues bantoues des groupes B.10, B.20, B.30 (Gabon-Congo) ( pp. 360 ) . Jacquot, André (1983) · Travaux et documents de l’ORSTOM (Office de la Recherche Scientifique et Technique d’Outre-Mer), #157 ·