Vidal, Ribas Antônio, and Nilson Gilberto Fleck. “Spontaneous Sunflower Control With Selective Herbicides for Soybeans”. Pesquisa Agropecuaria Brasileira, vol. 27, no. 4, Apr. 1992, pp. 549-60, doi:10.1590/S1678-3921.pab1992.v27.3682.