Piersanti, Antonio, Valentina Cannelli, and Gianfranco Galli. “Long Term Continuous Radon Monitoring in a Seismically Active Area”. Annals of Geophysics 58, no. 4 (September 30, 2015): S0437. Accessed September 26, 2022. https://www.annalsofgeophysics.eu/index.php/annals/article/view/6735.