Early Pleistocene distal pyroclastic-fallout material in continental and marine deposits of western Umbria (Italy): chemical composition, provenance and correlation potential (R. Bizzarri, A. Baldanza, M. Petrelli, F. Famiani, & A. Peccerillo , Trans.). (2010). Alpine and Mediterranean Quaternary, 23(2), 245-250. https://amq.aiqua.it/index.php/amq/article/view/279