Basso, K. C., U. Cecato, L. M. Barbero, B. Lempp, J. A. N. Gomes, and S. M. B. Lugão. “Influence of Nitrogen Levels on Leaf Anatomy and Nutritive Value of Millennium Grass”. Bioscience Journal, vol. 30, no. 3, Mar. 2014, pp. 792-0, https://seer.ufu.br/index.php/biosciencejournal/article/view/18158.