Ricco, C., I. Aquino, S. E. P. Borgstrom, and C. Del Gaudio. “19 Years of Tilt Data on Mt. Vesuvius: State of the Art and Future Perspectives”. Annals of Geophysics, vol. 56, no. 4, Nov. 2013, p. S0453, doi:10.4401/ag-6459.