Castellano, Corrado, Daniele Cinti, Giuliana D'Addezio, and Monia Procesi. “La Solfatara Di Penna in Teverina (Terni)”. Miscellanea INGV 67 (May 11, 2022). Accessed October 20, 2026. https://collane-editoriali.ingv.it/index.php/mi/article/view/253.