Fin, Silvana Spaniol, et al. “Duration of the Effects of Scarification and Raised Bed Associated With Vegetation Cover on Soybean Yield on an Alfisol”. Pesquisa Agropecuaria Brasileira, vol. 53, no. 11, Dec. 2018, pp. 1230-8, doi:10.1590/S1678-3921.pab2018.v53.25732.