Ricco, C., C. Del Gaudio, F. Quareni, and W. Marzocchi. “Spectral Analysis of the Clinometric Data at the Phlegraean Fields from 1992 to 1998”. Annals of Geophysics 43, no. 5 (December 25, 2000). Accessed April 24, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3677.