Bisognin, Dilson Antônio, et al. “Contents of Total Phenolics and Flavonoids in and Antioxidant Activity of <I>Ilex paraguariensis< I> Leaves”. Pesquisa Agropecuaria Brasileira, vol. 54, no. X, Sept. 2019, p. e0856, doi:10.1590/S1678-3921.pab2019.v54.26571.