@article{oliveira_mansur_2007,  title={Synthetic tooth enamel: SEM characterization of a fluoride hydroxyapatite coating for dentistry applications},  volume={10},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392007000200004},  DOI={10.1590/S1516-14392007000200004},  number={2},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Oliveira, Marise and Mansur, Herman Sander},  year={2007},  month={Apr},  pages={115–118} }