Kotsarenko, A., V. Grimalsky, V. Yutsis, A. G. Bravo Osuna, S. Koshevaya, H. R. Peréz Enríquez, G. Urquiza Beltrán, J. A. Lopez Cruz Abeyro, and C. Valdés Gonzales. “Experimental Studies of Anomalous Radon Activity in the Tlamacas Mountain, Popocatepetl Volcano Area, México: New Tools to Study Lithosphere-Atmosphere Coupling for Forecasting Volcanic and Seismic Events”. Annals of Geophysics, vol. 55, no. 1, Apr. 2012, doi:10.4401/ag-5318.