@article{afkhami_madrakian_siampour_2006,  title={Cloud point extraction spectrophotometric determination of trace quantities of bismuth in urine},  volume={17},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532006000400024},  DOI={10.1590/S0103-50532006000400024},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Afkhami, Abbas and Madrakian, Tayyebeh and Siampour, Hajar},  year={2006},  month={Aug},  pages={797–802} }