Giorgi, Gabriele. “Man-Induced Changes in Urban Geomorphology: The Historic Centre of Bologna (Italy)”. Geografia Fisica e Dinamica Quaternaria 25, no. 2 (December 31, 2002): 111–121. Accessed May 1, 2026. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/418.