Colangelo, G., M. Lanfredi, V. Lapenna, M. Macchiato, and F. Vallianatos. “Short Time Scale Laws in Self-Potentialsignals from Two Different Seismically Active Mediterranean areas(the Southern Apennine Chainand Crete Island)”. Annals of Geophysics, vol. 44, no. 2, Dec. 2001, doi:10.4401/ag-3591.