Gonzalez, Norma, et al. “Effect of Soil Interacting Herbicides on Soybean Nodulation in Balcarce, Argentina”. Pesquisa Agropecuaria Brasileira, vol. 34, no. 7, July 1999, pp. 1167-73, doi:10.1590/S1678-3921.pab1999.v34.5320.