Chiarini, Edi, et al. , translators. “Plio-Quaternary Geological Evolution of the High Salto River Valley (Central Italy): The Marano de’ Marsi Unit”. Alpine and Mediterranean Quaternary, vol. 22, no. 2, Oct. 2009, pp. 325-44, https://amq.aiqua.it/index.php/amq/article/view/314.