Blanco, Hélio Garcia, and Domingos de Azevedo Oliveira. 2014. “Persistence of Ametryne, Atrazine, Simazine and Diuron in Soil, After Repeated Annual Applications in Sugar Cane Culture”. Pesquisa Agropecuaria Brasileira 24 (9):1161-68. https://doi.org/10.1590/S1678-3921.pab1989.v24.16318.