Santos, Maria Aparecida dos, et al. “Identification of QTL Associated With the Symbiosis of <i>Bradyrhizobium japonicum< i>; <i>B. elkanii< i> And Soybean”. Pesquisa Agropecuaria Brasileira, vol. 41, no. 1, Jan. 2006, pp. 67-75, doi:10.1590/S1678-3921.pab2006.v41.7107.