Di Maio, R., D. Patella, Z. Petrillo, A. Siniscalchi, G. Cecere, and P. De Martino. 2000. “Application of Electric and Electromagnetic Methods to the Definition of the Campi Flegrei Caldera (Italy)”. Annals of Geophysics 43 (2). https://doi.org/10.4401/ag-3645.