Fratini, S., F. M. Francesconi, R. Checcucci, F. Frondini, D. Lanzi, and R. Spinsanti. “Vulsino Volcanic Aquifer in Umbria Region : Hydrogeological Survey for the Characterization of the Presence of Arsenic and Aluminium and the Correct Use of Groundwater”. Acque Sotterranee - Italian Journal of Groundwater, vol. 2, no. 4, Dec. 2013, doi:10.7343/as-048-13-0075.