1. Volcanites of the Ethiopian and Somali plateaux and major tectonic lines;Abbate,1980
2. AERMAP, 1969. Meki River diversion scheme: topographic surveys. Imperial Ethiopian Government, Awash Valley Authority, Addis Ababa
3. Le oscillazioni tardo-quaternarie del Lago Shala (Rift Etiopico): Analisi dell’evoluzione ambientale dall’integrazione di evidenze morfologiche, sedimentarie e cronologiche;Alessio;Il Quaternario,1996
4. Balemwald, A., 1998. The Late Quaternary lacustrine sediments of the Ziway–Shala Basin (Ethiopia): paleoenvironmental interpretation based on the ostracofauna. Doctorate Dissertation, University of Modena, Italy, p. 173
5. K–Ar and fission tracks ages of the last volcano–tectonic phase in the Ethiopian Rift Valley (Tulu Moye area);Bigazzi;Geology and Mineral Resources of Somalia and Surrounding Regions. Ist. Agronom. Oltremare, Firenze, Relaz. Monograf.,1993