D. Tuesca, E. Puricelli, L. Nisensohn, D. Faccini, and J. Papa, “Decision criteria for optimizing postemergence Johnsongrass control in soybean crops in Argentina”, PAB, vol. 34, no. 5, pp. 749–753, May 1999, doi: 10.1590/S1678-3921.pab1999.v34.5266.