オモ語派
Bender, M. L. 1975. Omotic: a new Afroasiatic language family. (University Museum Series, 3.) Carbondale, IL: Southern Illinois University.
Blench, Roger. 2006. Archaeology, Language, and the African Past. AltaMira Press
Hayward, Richard J., ed. 1990. Omotic Language Studies. London: School of Oriental and African Studies.
Hayward, Richard J. 2003. Omotic: the "empty quarter" of Afroasiatic linguistics.