Antonini G. 1, Ardizzone F. 2, Cardinali M. 3, Galli M. 4, Guzzetti F. 5, Reichenbach P. 6, 2002, Surface deposits and landslide inventory map of the area affected by the 1997 Umbria-Marche earthquakes, Bollettino della Società Geologica Italiana (Online) Sp.1 (2002): 843–853.,
URL: http://www.cnr.it/prodotto/i/66849

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