@article{bahar_zakerian_2012,  title={Determination of copper in human hair and tea samples after dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO)},  volume={23},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532012000600023},  DOI={10.1590/S0103-50532012000600023},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Bahar, Soleiman and Zakerian, Razieh},  year={2012},  month={Jun},  pages={1166–1173} }