@article{kowalski_costa_godoy_augusto_2010,  title={Determination of polychlorinated biphenyls in brazilian breast milk samples using solid-phase microextraction and gas chromatography-electron capture detection},  volume={21},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532010000300016},  DOI={10.1590/S0103-50532010000300016},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Kowalski, Cláudia H. and Costa, Josemar G. and Godoy, Helena T. and Augusto, Fabio},  year={2010},  pages={502–509} }