Pergola, N., C. Pietrapertosa, T. Lacava, and V. Tramutoli. “Robust Satellite Techniques for Monitoring Volcanic Eruptions”. Annals of Geophysics 44, no. 2 (December 25, 2001). Accessed April 20, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3590.