Di Maio, R., D. Patella, Z. Petrillo, A. Siniscalchi, G. Cecere, and P. De Martino. “Application of Electric and Electromagnetic Methods to the Definition of the Campi Flegrei Caldera (Italy)”. Annals of Geophysics 43, no. 2 (December 25, 2000). Accessed October 25, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3645.