Guzzetti F., Cardinali M., Reichenbach P., Galli M., Ardizzone F., 2004, Geomorphological mapping to assess landslide risk_ examples from the Umbria Region, Central Italy., International Conference on Slopeland Disaster Mitigation,, Taipei, 2004,
URL: http://www.cnr.it/prodotto/i/88628

Data from https://intranet.cnr.it/people/