Scarpa, R.; Amoruso, A.; Crescentini, L.; Fischione, C.; Formisano, L. A.; La Rocca, M.; Tronca, F. Slow Earthquakes and Low Frequency Tremor Along the Apennines, Italy. Ann. Geophys. 2008, 51 (2-3). https://doi.org/10.4401/ag-3028.