@article{costa_hartz_2009,  title={Evaluation of trace metals (cadmium, chromium, copper and zinc) in tissues of a commercially important fish (Leporinus obtusidens) from Guaíba Lake, Southern Brazil},  volume={52},  ISSN={1516-8913},  url={https://doi.org/10.1590/S1516-89132009000100029},  DOI={10.1590/S1516-89132009000100029},  number={1},  journal={Brazilian Archives of Biology and Technology},  publisher={Instituto de Tecnologia do Paraná - Tecpar},  author={Costa, Silene de Carvalho and Hartz, Sandra Maria},  year={2009},  month={Jan},  pages={241–250} }