Jordan, T. H., Y.-T. Chen, P. Gasparini, R. Madariaga, I. Main, W. Marzocchi, G. Papadopoulos, G. Sobolev, K. Yamaoka, and J. Zschau. “OPERATIONAL EARTHQUAKE FORECASTING. State of Knowledge and Guidelines for Utilization”. Annals of Geophysics, vol. 54, no. 4, Aug. 2011, doi:10.4401/ag-5350.