Guzzetti F.; Peruccacci S.; Rossi M.; Stark C.P., 2007, Rainfall thresholds for the initiation of landslides in central and southern Europe., Meteorology and atmospheric physics (Print) 98 (2007): 239–267. doi_10.1007/s00703-007-0262-7,
URL: http://www.cnr.it/prodotto/i/41550

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