@article{vieira_lelis_silva_oliveira_2011,  title={Tannin Extraction from the Bark of <i>Pinus oocarpa</i> var. <i>oocarpa</i> with Sodium Carbonate and Sodium Bisulfite},  volume={18},  ISSN={2179-8087},  url={https://doi.org/10.4322/floram.2011.017},  DOI={10.4322/floram.2011.017},  number={1},  journal={Floresta e Ambiente},  publisher={Floresta e Ambiente - Instituto de Florestas, Universidade Federal Rural do Rio de Janeiro.},  author={Vieira, Michel Cardoso and Lelis, Roberto Carlos Costa and Silva, Bruno Couto da and Oliveira, Gisely de Lima},  year={2011},  month={Mar},  pages={1–8} }