Campo, R. J. and Wood, M. (2001) “Residual Effects of successive exposure of soybean <i>Bradyrhizobium</i> strains to aluminium on solid defined medium”, Pesquisa Agropecuaria Brasileira, 36(11), pp. 1399–1407. doi: 10.1590/S1678-3921.pab2001.v36.6273.