Blanco, I., A. Garcìa, and J. M. Torta. “Magnetic Study of the Furnas Caldera (Azores)”. Annals of Geophysics 40, no. 2 (November 25, 1997). Accessed April 24, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/3917.