(en) Edward Lipiński, Semitic Languages : Outline of a Comparative Grammar Volume 80 of Orientalia Lovaniensia analecta, Louvain, Peeters Publishers, , 780 p. (ISBN90-429-0815-7, lire en ligne), p. 21
Marianne Bechaus-Gerst et Roger Blench, The Origins and Development of African Livestock: Archaeology, Genetics, Linguistics and Ethnography - "Linguistic evidence for the prehistory of livestock in Sudan" (2000), Routledge, (ISBN1135434166, lire en ligne), p. 453
Peter Behrens, Libya Antiqua : Report and Papers of the Symposium Organized by Unesco in Paris, 16 to 18 January 1984 : "Language and migrations of the early Saharan cattle herders : the formation of the Berber branch", Unesco, (ISBN92-3-102376-4, lire en ligne), p. 30
