P. Unseth, “Tadesse Jaleta Jirata. A Contextual Study of the Social Function of Guji-Oromo Proverbs. Saarbrücken 2009 and: Abdullahi A. Shongolo and Günther Schlee. Boran Proverbs in their Cultural Context. Köln 2007”, Proverbium, vol. 28, no. 1, pp. 427–434, Aug. 2011.