Etiope, G., M. Calcara, and F. Quattrocchi. “Seismogeochemical Algorithms for Earthquake Prediction: An Overview”. Annals of Geophysics 40, no. 6 (November 25, 1997). Accessed May 3, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3825.