Bortolan, Simone, et al. “Expression of <i>nodC< i>, <i>nodW< i> and <i>nopP< i> Genes in <i>Bradyrhizobium japonicum< I> CPAC 15 Strain Evaluated by RT-QPCR”. Pesquisa Agropecuaria Brasileira, vol. 44, no. 11, Dec. 2010, pp. 1491-8, doi:10.1590/S1678-3921.pab2009.v44.3104.