Lamego, Fabiane Pinto, et al. “Genetic and Geographic Distance Among Beggar-Ticks Accesses Susceptible and Resistant to Acetolactate Sintase Herbicide Inhibitors”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 6, June 2006, pp. 963-8, doi:10.1590/S1678-3921.pab2006.v41.7232.