Blanco, H.G. and Oliveira, D. de A. (2014) “Persistence of ametryne, atrazine, simazine and diuron in soil, after repeated annual applications in sugar cane culture”, Pesquisa Agropecuaria Brasileira, 24(9), pp. 1161–1168. doi:10.1590/S1678-3921.pab1989.v24.16318.