@article{giordano_nunes_teixeira_rodrigues_2021,  title={Green Synthesis of Upconverting NaYF<sup>4</sup> and NaGdF<sup>4</sup> Materials and Energy Levels Determination},  volume={32},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20210052},  DOI={10.21577/0103-5053.20210052},  number={8},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Giordano, Luidgi and Nunes, Matheus F. and Teixeira, Verônica C. and Rodrigues, Lucas C. V.},  year={2021},  month={Aug},  pages={1552–1558} }