Coppola, B., Lapenna, V., Mancini, M. and Patella, D. 1994. Application of unconventional geoelectrical methods to the hydrogeological examination of the Mt. S. Croce rock formations (Umbria, Italy) involved in a railway tunnel project. Annals of Geophysics. 37, 5 Sup. (Nov. 1994). DOI:https://doi.org/10.4401/ag-4171.