Rapport sur l’orpaillage sur le plateau des Guyanes / Relatório sobre o garimpo de ouro no planalto das Guianas: Rahm M., Thibault P., Shapiro A., Smartt T., Paloeng C., Crabbe S., Farias P., Carvalho R., Joubert P. (2017). Monitoring the impact of gold mining on the forest cover and freshwater in the Guiana Shield. Reference year 2015. pp.20: 

Rapport sur l’orpaillage sur le plateau des Guyanes / Relatório sobre o garimpo de ouro no planalto das Guianas: Rahm M., Thibault P., Shapiro A., Smartt T., Paloeng C., Crabbe S., Farias P., Carvalho R., Joubert P. (2017). Monitoring the impact of gold mining on the forest cover and freshwater in the Guiana Shield. Reference year 2015.