Regina Jacques Bohrer, Temis, and Mariangela Hungria. “Evaluation of Soybean Cultivars for Biological Nitrogen Fixation”. Pesquisa Agropecuaria Brasileira 33, no. 6 (June 1, 1998): 937–952. Accessed July 8, 2026. https://apct.sede.embrapa.br/pab/article/view/4921.