Fernandes, M. F., Fernandes, R. P. M. and Hungria, M. (2003) “Selection of indigenous rhizobia to the cowpea; pigeonpea and jackbean crops in the coastal tableland of Sergipe; Brazil”, Pesquisa Agropecuaria Brasileira, 38(7), pp. 835–842. doi: 10.1590/S1678-3921.pab2003.v38.6643.