Gonçalves, Deyvison Andrey Medrado, et al. “Adsorption of Cadmium and Copper in Representative Soils of Eastern Amazonia, Brazil”. Semina: Ciências Agrárias, vol. 37, no. 5, Oct. 2016, pp. 3005-16, doi:10.5433/1679-0359.2016v37n5p3005.