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) ·

Field trip to record the status of some little-known Nigerian languages ( pp. 11-14 ) . Roger Blench (1999) · Ogmios Newsletter. http://www.ogmios.org/ogmios/Ogmios_011.pdf

The Ningye Language of Central Nigeria and its Affinities . Roger Blench (2006) ·