V. Agnesi, P. Cosentino, C. Di Maggio, T. Macaluso, and E. Rotigliano, “The great landslide at Portella Colla (Madonie, Sicily)”, Geog. Fis. Dinam. Quat., vol. 19, no. 2, pp. 273–280, Dec. 1996, Accessed: Sep. 21, 2026. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/591