Fermino Jr., P. C. P., and G. D. Fockink. “Leaf Anatomy of Young Plants of Erva-Mate (Ilex Paraguariensis A. ST. HILL.) under Different Shading Levels”. Scientia Agraria Paranaensis, vol. 16, no. 3, Oct. 2017, pp. 335-41, https://saber.unioeste.br/index.php/scientiaagraria/article/view/15298.