Gregori, G. P. “Geomagnetism, Volcanoes, Global Climate Change, and Predictability. A Progress Report”. Annals of Geophysics 37, no. 5 Sup. (November 25, 1994). Accessed March 31, 2026. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4178.