Petter, Fabiano André, et al. “Selectivity of Herbicides to Corn and braquiária Grass Intercropping in a Crop-Livestock Integration System”. Semina: Ciências Agrárias, vol. 32, no. 3, Aug. 2011, pp. 855-64, doi:10.5433/1679-0359.2011v32n3p855.