1. Aumento, F.: Uranium content of Mid-oceanic basalts, E.P.S.L.,11, 90–94, 1971.
2. Barberi, F., Ferrara, G., Santacroce, R., &Varet, J.: Structural evolution of the Afar triple junction. - In: Afar Depression of Ethiopia, Bad Bergzabern (F. R. Germany) april 1974,Vol. I,A. Pilger &A. Rösler Ed., Stuttgart (Schweizerbart'sche Verlagsbuchhandlung) 1975.
3. Barberi, F., &Varet, J.: The Erta'Ale volcanic range (Afar, Etiopia). - Bull. Volc.,T. 34, 848–917, 1970.
4. —: Volcanism on Afar: small scall plate tectonics implications. - Geol. Soc. Am. Bull.,88, 1251–1266, 1977.
5. Battaglia, M., Cristofolini, R., Di Girolamo, P., &Stanzione, D.: REE and other trace elements distribution and the origin of the Ibleau magmas. - J. Volc. Geothem. Res.,1, 305–329, 1976.