D. Gasperini, J. Blichert-Toft, F. Albarède, A. Del Moro, and P. Macera, “HF-ND ISOTOPE CORRELATION IN THE QUATERNARY POTASSIC MAGMATISM FROM CENTRAL ITALY: NEW EVIDENCE OF OCEANIC CRUST CONTRIBUTION TO THE MAGMA SOURCE”, Ofioliti, vol. 24, no. 1b, p. 95, Mar. 1999.