Lima, C. L. R. de, C. N. Pillon, S. D. dos A. e Silva, and R. J. Kunde. “Physical Indicators of Soil Quality of Alfisol under Conventional System of Physic Nut”. Bioscience Journal, vol. 28, no. 1, Mar. 2012, pp. 203-11, https://seer.ufu.br/index.php/biosciencejournal/article/view/13231.