Guzzetti F, Reichenbach P, Ardizzone F, Cardinali M, Galli M. Landslide hazard assessment, vulnerability estimation and risk evaluation: an example from the Collazzone area (Central Umbria, Italy). Geog. Fis. Dinam. Quat. 2009;32(2):183-192. Accessed October 22, 2026. https://gfdq.glaciologia.it/index.php/GFDQ/article/view/268