M. L. Colalongo, “The Neogene/Quaternary boundary definition: a review and proposal”, Geog. Fis. Dinam. Quat., vol. 5, no. 1, pp. 59–68, Jun. 1982, Accessed: Apr. 03, 2025. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/967