ANGELI M.-G., BISCI C., BURATTINI F., DRAMIS F., LEOPERDI S., PONTONI F., PONTONI F., 1996, Two Examples of Large-Scale Landslides Affecting Built-Up Areas in the Marche Region (Central Italy), Quaderni di geologia applicata 3 (1996): 131–140.,
URL: http://www.cnr.it/prodotto/i/314074

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