@article{henz_guimarães_evaristo_rocha_melo_macedo_ghesti_2021,  title={New Greener Method for the Preparation of Heteropolyacid Compounds (HPW) Modified with Metallic Tin and Application in the Lactic Acid Esterification Reaction},  volume={32},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20200204},  DOI={10.21577/0103-5053.20200204},  number={3},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Henz, Mariane M. and Guimarães, Munique G. and Evaristo, Rafael B. W. and Rocha, Rafael O. and Melo, Lennine R. de and Macedo, Julio L. de and Ghesti, Grace F.},  year={2021},  month={Mar},  pages={503–512} }