Costa, I. S. L., da Silva, G. F., & Ferreira, M. V. (2019). Application of Zipf’s law to estimate undiscovered gold endowment in the Quadrilátero Ferrífero Province, Brazil. Journal of the Geological Survey of Brazil, 2(3), 165–172. https://doi.org/10.29396/jgsb.2019.v2.n3.3