@article{ribeiro_lima_faria_rocha_calefi_ciuffi_nassar_2014,  title={Sol-gel as methodology to obtain bioactive materials},  volume={86},  ISSN={0001-3765},  url={https://doi.org/10.1590/0001-37652014106012},  DOI={10.1590/0001-37652014106012},  number={1},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={RIBEIRO, THIAGO J. and LIMA, OMAR J. DE and FARIA, EMERSON H. and ROCHA, LUCAS A. and CALEFI, PAULO S. and CIUFFI, KATIA J. and NASSAR, EDUARDO J.},  year={2014},  month={Mar},  pages={27–36} }