@article{araujo_bauerfeldt_cid_2018,  title={Determination of 4-Nonylphenol in Surface Waters of the Guandu River Basin by High Performance Liquid Chromatography with Ultraviolet Detection},  volume={29},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20180079},  DOI={10.21577/0103-5053.20180079},  number={10},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Araujo, Frederico G. de and Bauerfeldt, Glauco F. and Cid, Yara P.},  year={2018},  month={Oct},  pages={2046–2053} }