@article{nanni_roisenberg_fachel_mesquita_danieli_2008,  title={Fluoride characterization by principal component analysis in the hydrochemical facies of Serra Geral Aquifer System in Southern Brazil},  volume={80},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652008000400010},  DOI={10.1590/S0001-37652008000400010},  number={4},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Nanni, Arthur and Roisenberg, Ari and Fachel, Jandyra M.G. and Mesquita, Gilberto and Danieli, Cristiano},  year={2008},  month={Dec},  pages={693–701} }