Blanco, Hélio García, et al. “Persistence of Metribuzin Herbicide in Soils under Soybean Crop”. Pesquisa Agropecuaria Brasileira, vol. 18, no. 10, Apr. 2014, pp. 1073-84, doi:10.1590/S1678-3921.pab1983.v18.15427.