Amato, A., B. Alessandrini, G. Cimini, A. Frepoli, and G. Selvaggi. 1993. “Active and Remnant Subducted Slabs Beneath Italy: Evidence from Seismic Tomography and Seismicity”. Annals of Geophysics 36 (2). https://doi.org/10.4401/ag-4272.