De Martino, Prospero, Umberto Tammaro, and Francesco Obrizzo. “GPS Time Series at Campi Flegrei Caldera (2000-2013)”. Annals of Geophysics 57, no. 2 (May 9, 2014): S0213. Accessed April 27, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/6431.