Filho, P. J. S., L. Nunes, N. da Rosa, G. R. Betemps, and R. S. Pereira. “Comparison Among Native Floating Aquatic Macrophytes for Bioconcentration of Heavy Metals”. Ecotoxicology and Environmental Contamination, vol. 10, no. 1, Feb. 2015, pp. 1-6, doi:10.5132/eec.2015.01.01.