Nascimento, E. L. do, J. P. O. Gomes, R. Almeida, W. R. Bastos, J. V. E. Bernardi, and R. K. Miyai. “Mercury in the Plankton of an Amazon Natural Lake, Puruzinho Lake (Brazil)”. Ecotoxicology and Environmental Contamination, vol. 2, no. 1, Mar. 2007, pp. 67-72, doi:10.5132/jbse.2007.01.010.