B. Gutenberg, C. F. Richter, "Frequency of Earthquakes in California", p. 186, Bulletin of the Seismological Society of America, vol. 34, iss. 4, pp. 185-188, 1944
Burud, Nitin B; Kishen, J M Chandra. "Application of generalized logistic equation for b-value analysis in fracture of plain concrete beams under flexure", Engineering Fracture Mechanics Vol 210, 2019, pp. 228–246. doi:10.1016/j.engfracmech.2018.09.011
Sanchez E; Vega-Jorquera P. "New Bayesian frequency–magnitude distribution model for earthquakes applied in Chile", Physica A: Stat. Mech. and its Appl. Vol 508, 2018, pp. 305–312. doi:10.1016/j.physa.2018.05.119