Del Negro, C., E. Armadillo, E. Bozzo, L. Cafarella, A. Meloni, R. Napoli, and A. Zirizzotti. “Piezomagnetic Effects Induced by Artificial Sources at Mt. Vesuvius (Italy): Preliminary Results of an Experimental Survey”. Annals of Geophysics, vol. 41, no. 3, Nov. 1998, doi:10.4401/ag-4344.