F. Guzzetti, P. Reichenbach, F. Ardizzone, M. Cardinali, and M. Galli, “Landslide hazard assessment, vulnerability estimation and risk evaluation: an example from the Collazzone area (Central Umbria, Italy)”, Geog. Fis. Dinam. Quat., vol. 32, no. 2, pp. 183–192, Dec. 2009, Accessed: Oct. 22, 2026. [Online]. Available: https://gfdq.glaciologia.it/index.php/GFDQ/article/view/268