Extraction of bark tannins from three tree species in the Orinoquia region. Rev Sist Prod Agroecol. [Internet]. 2018 Dec. 15 [cited 2026 Mar. 7];9(2):36-51. Available from: https://ojsunillanos.dev5.metabiblioteca.com.co/index.php/sistemasagroecologicos/article/view/716