Antonini G., Ardizzone F., Cardinali M., Galli M., Guzzetti F., Reichenbach P., 2002, Surface deposits and landslide inventory map of the area affected by the 1997 Umbria-Marche earthquakes, Sp.1 (2002): 843–853.,
URL: http://www.cnr.it/prodotto/i/66774

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