Ramos-Arroyo, Yann René, et al. “Geological and Mineralogical Characteristics, and Extraction History of the Guanajuato Mining District, Mexico.Possible Geochemical Sceneries for the Tailings”. Revista Mexicana De Ciencias Geológicas, vol. 21, no. 2, May 2018, pp. 268-84, https://rmcg.unam.mx/index.php/rmcg/article/view/893.