Agostinetto, D. et al. 2013. Relative competitive ability of crabgrass in coexistence with flooded rice and soybean. Pesquisa Agropecuaria Brasileira. 48, 10 (Dec. 2013), 1315–1322. DOI:https://doi.org/10.1590/S1678-3921.pab2013.v48.16228.