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/

The verb in Kusuntu ( pp. 95-101 ) . Kleinewillinghöfer, Ulrich (2000) · Cahiers voltaïques / Gur papers. 5

Drei Dialekte der Tem in Togo: Cãla, Delo und Bagó. Nach Aufnahmen von A. Mischlich ( pp. 7-33 ) . D. Westermann (1933) · Mittheilungen des Seminars für Orientalische Sprachen. XXXVI