Pereira, Liese de Vargas, et al. “Is the Chemical Control of Glyphosate-Resistant Hairy Fleabane More Efficient During Pre-Flowering or Re-Growth?”. Revista De Ciências Agroveterinárias, vol. 15, no. 3, Nov. 2016, pp. 277-80, doi:10.5965/223811711532016277.