Negri, A., F. Florindo, P. C. Lurcock, S. Marabini, C. Morigi, G. Mastronuzzi, C. Vetrone, and G. B. Vai. “THE FRONTE CANDIDATE SECTION FOR THE UPPER PLEISTOCENE GSSP: A SHORT REPORT”. Alpine and Mediterranean Quaternary, vol. 29, no. 2, Dec. 2016, pp. 137-42, https://amq.aiqua.it/index.php/amq/article/view/99.