@article{soares_costa_araujo_zucchi_celino_teixeira_2015,  title={Determination of Polycyclic Aromatic Hydrocarbons in Groundwater Samples by Gas Chromatography-Mass Spectrometry After Pre-Concentration Using Cloud‑Point Extraction with Surfactant Derivatization},  volume={26},  ISSN={0103-5053},  url={https://doi.org/10.5935/0103-5053.20150057},  DOI={10.5935/0103-5053.20150057},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Soares, Sarah A. R. and Costa, Cibele R. and Araujo, Rennan G. O. and Zucchi, Maria R. and Celino, Joil J. and Teixeira, Leonardo S. G.},  year={2015},  month={May},  pages={955–962} }