50-year seasonal variability in East African droughts and floods recorded in central Afar lake sediments (Ethiopia) and their connections with the El Niño–Southern Oscillation oleh C. Mologni, M. Revel, E. Chaumillon, E. Malet, T. Coulombier, P. Sabatier, P. Brigode, G. Hervé, A.-L. Develle, L. Schenini, M. Messous, G. Davtian, A. Carré, D. Bosch, N. Volto, C. Ménard, L. Khalidi, F. Arnaud