@article{andrade_1998,  title={
     },  volume={21},  ISSN={0100-4042},  url={https://doi.org/10.1590/S0100-40421998000400009},  DOI={10.1590/S0100-40421998000400009},  number={4},  journal={Química Nova},  publisher={Sociedade Brasileira de Química},  author={Andrade, Jailson B. de},  year={1998},  month={Jul} }