@article{souza_salviano_melo_felix_belém_ramos_2016,  title={Seasonal study of concentration of heavy metals in waters from lower São Francisco River basin, Brazil},  volume={76},  ISSN={1519-6984},  url={https://doi.org/10.1590/1519-6984.05215},  DOI={10.1590/1519-6984.05215},  number={4},  journal={Brazilian Journal of Biology},  publisher={Instituto Internacional de Ecologia},  author={Souza, A. M. and Salviano, A. M. and Melo, J. F. B. and Felix, W. P. and Belém, C. S. and Ramos, P. N.},  year={2016},  month={Oct},  pages={967–974} }