T. Pi, J. Solé, O. Morton-Bermea, Y. Taran, and E. Hernández-Álvarez, “Lanthanide geochemistry of the fluorite deposits in the Taxco and Zacualpan mining districts, southern Mexico: implications for the origin and evolution of fluids”, revmexcg, vol. 34, no. 3, pp. 199–211, Nov. 2017.