Pereira, J. C. (1991) “Efficiency and competitiveness of <i>Rhizobium leguminosarum</i> bv. <i>phaseoli</i> strains in field beans”, Pesquisa Agropecuaria Brasileira, 26(7), pp. 1073–1080. doi: 10.1590/S1678-3921.pab1991.v26.3441.