H. T. Verstappen, “Science and technology for natural disaster reduction”, Geog. Fis. Dinam. Quat., vol. 3, no. 3, pp. 199–200, Jan. 1999, Accessed: Jul. 30, 2026. [Online]. Available: https://www.gfdq.glaciologia.it/index.php/GFDQ/article/view/1189