Federici, Paolo Roberto. “Paradigmi E Teorie Della Geomorfologia: Models and Theories of Geomorphology”. Geografia Fisica e Dinamica Quaternaria 7 (December 1, 2005): 3–8. Accessed March 10, 2026. https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1263.