1. Aki, K. (1965), Maximum Likelihood Estimate of b in the Formula log N = a - b M and its Confidence Limits, Bull. Earthq. Res. Inst. Tokyo Univ. 43, 237-239.
2. Bender, B. (1983), Maximum Likelihood Estimation of b Values for Magnitude Grouped Data, Bull. Seismol. Soc. Am. 73, 831-851.
3. Bird, P., and Kagan, Y. (2004), Plate-tectonic Analysis of Shallow Seismicity: Apparent Boundary Width, Beta-value, Corner Magnitude, Coupled Lithosphere Thickness, and Coupling in 7 Tectonic Settings, Bull. Seismol. Soc. Am. 94, 2380–2399, doi: 10.1785/0120030107 .
4. Bowman, A. W., Hall, P., and Titterington, D. M. (1984), Cross-validation in non-parametric estimation of probabilities and probability densities, Biom. 71, 341–351.
5. Convertito, V., Maercklin, N., Sharma, N., and Zollo, A. (2012), From Induced Seismicity to Direct Time-dependent Seismic Hazard, Bull. Seismol. Soc. Am. 102, 2563–2573, doi: 10.1785/0120120036 .