Mariucci, M. T., P. Montone, and S. Pierdominici. “Active Stress Field in Central Italy: A Revision of Deep Well Data in the Umbria Region”. Annals of Geophysics 51, no. 2-3 (December 25, 2008): 433–442. Accessed December 1, 2021. https://www.annalsofgeophysics.eu/index.php/annals/article/view/4449.