1. Anderegg, D., Dodge, R.E., Swart, P.K., Fisher, L. 1997. Barium chronologies from South Florida reef corals – environmental implications. In: Proceedings of Eighth International Coral Reef Symposium, vol. 2, pp. 1725–1730.
2. Fluvial contamination associated with artisanal gold mining in the Ponce Enriquez, Portovel-Zaruma and Nambija areas, Ecuador;Appleton;Water, Air, and Soil Pollution,2001
3. Aspinall, C. 2001. Small-scale mining in Indonesia. International Institute for Environment and Development, Mining Minerals and Sustainable Development Report No. 79, 30 p.
4. Metal content on the reef coral Porites astreoides: an evaluation of river influence and 35 years of chronology;Bastidas;Marine Pollution Bulletin,1997
5. Mineralogy and trace element relative solubility of coastal marine sediments affected by submarine tailings disposal and small-scale gold mining, North Sulawesi, Indonesia;Blackwood;Environmental Geology,2007