Ramos, Maria Lucrecia Gerosa, et al. “Differences in Ureide and Amino Acid Content of Water Stressed Soybean Inoculated With Bradyrhizobium Japonicum and B. Elkanii”. Pesquisa Agropecuaria Brasileira, vol. 40, no. 5, May 2005, pp. 453-8, https://doi.org/10.1590/S1678-3921.pab2005.v40.6978.