Ciccacci, Sirio, et al. “Erosion and Recent Morphological Change in a Sample Area of the Upper Orcia River Basin (Southern Tuscany, Italy)”. Geografia Fisica E Dinamica Quaternaria, vol. 26, no. 2, Dec. 2003, pp. 97-109, https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/402.