Vargas, Milton Alexandre T., and Allert Rosa Suhet. “Efficiency of Commercial Inoculants and Native Rhizobium Strains in Six Forage Legumes on a Cerrado Soil”. Pesquisa Agropecuaria Brasileira, vol. 16, no. 3, Apr. 2014, pp. 357-62, doi:10.1590/S1678-3921.pab1981.v16.16893.