Souza, Gustavo Soares de, et al. “Soil Compressibility and Root System of Sugarcane With and Without controlled‑traffic Farming”. Pesquisa Agropecuaria Brasileira, vol. 47, no. 4, May 2012, pp. 603-12, doi:10.1590/S1678-3921.pab2012.v47.12048.