Bonato, Emídio Rizzo, et al. “Oil and Protein Content in Soybean Genotypes Developed After 1990”. Pesquisa Agropecuaria Brasileira, vol. 35, no. 12, Dec. 2000, pp. 2391-8, doi:10.1590/S1678-3921.pab2000.v35.6034.