@article{1999,  title={
     },  volume={2},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14391999000400001},  DOI={10.1590/S1516-14391999000400001},  number={4},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  year={1999},  month={Oct} }