Santos, M.A. dos et al. 2006. Identification of QTL associated with the symbiosis of Bradyrhizobium japonicum; B. elkanii and soybean. Pesquisa Agropecuaria Brasileira. 41, 1 (Jan. 2006), 67–75. DOI:https://doi.org/10.1590/S1678-3921.pab2006.v41.7107.