@article{martins_serra_2010,  title={Thin film of ZnAl2O4:Eu3+ synthesized by a non-alkoxide precursor sol-gel method},  volume={21},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532010000700028},  DOI={10.1590/S0103-50532010000700028},  number={7},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Martins, Renata F. and Serra, Osvaldo A.},  year={2010},  pages={1395–1398} }