1. Aki, K., Maximum likelihood estimate of b in the formula log N = a – bM and its confidence limits, Bull. Earthquake Res. Inst., Univ. Tokyo, 1965, vol. 43, pp. 237–239.
2. Amitrano, D., Brittle_ductile transition and associated seismicity: Experimental and numerical studies and relationship with the b value, J. Geophys. Res., 2003, vol. 108, no. B1, p. 2044. https://doi.org/10.1029/2001JB000680
3. Baskoutas, I. and Popandopoulos, G., Qualitative precursory pattern before several strong earthquakes in Greece, Res. Geophys., 2014, vol. 4, pp.7–11. https://doi.org/10.4081/rg.2014.4899
4. Bath, M., Spectral Analysis in Geophysics, Amsterdam: Elsevier, 1974.
5. Bykov, V.G., Strain waves in the Earth: theory, field data, and models, Russ. Geol. Geophys., 2005, no. 11, pp. 1158–1170.