@article{carvalho_kehrle_sampaio_2007,  title={Prevalence and severity of dental fluorosis among students from João Pessoa, PB, Brazil},  volume={21},  ISSN={1806-8324},  url={https://doi.org/10.1590/S1806-83242007000300002},  DOI={10.1590/S1806-83242007000300002},  number={3},  journal={Brazilian Oral Research},  publisher={Sociedade Brasileira de Pesquisa Odontológica - SBPqO},  author={Carvalho, Thiago Saads and Kehrle, Helen Moura and Sampaio, Fábio Correia},  year={2007},  month={Jul},  pages={198–203} }