^Kossmann, M. (2008).Three irregular Berber verbs: "Eat", "drink", "be cooked, ripen." In A. Lubotsky, J. Schaeken, & J. Wiedijk (Eds.),Evidence and counter-evidence: Essays in honour of Frederik Kortlandt. Volume 2: General linguistics (Vol. 33, pp. 225–236). Rodopi,page 234