Fermino Jr., P. C. P., e 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, outubro de 2017, p. 335-41, https://e-revista.unioeste.br/index.php/scientiaagraria/article/view/15298.