Cristiano, L., Petrosino, S., Saccorotti, G., Ohrnberger, M., & Scarpa, R. (2010). Shear-wave velocity structure at Mt. Etna from inversion of Rayleigh-wave dispersion patterns (2 s < T < 20 s). Annals of Geophysics, 53(2), 69–78. https://doi.org/10.4401/ag-4574