C. Cencetti, “Evoluzione del reticolo idrografico in un tratto umbro-marchigiano dello spartiacque principale dell’Appennino: Hydrographic net’s evolution in an area of the mean divide of the Apennines (Umbria-Marche)”, Geog. Fis. Dinam. Quat., vol. 11, no. 1, pp. 11–24, Jun. 1988, Accessed: Sep. 21, 2026. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/844