Extraction of bark tannins from three tree species in the Orinoquia region. Revista Sistemas de Producción Agroecológicos, [S. l.], v. 9, n. 2, p. 36–51, 2018. DOI: 10.22579/22484817.716. Disponível em: https://ojs-unillanos-prueba.metarevistas.org/index.php/sistemasagroecologicos/article/view/716. Acesso em: 14 sep. 2026.