Baraibar, A. et al. 1999. Symbiotic effectiveness and ecological characterization of indigenous <i>Rhizobium loti</i> populations in Uruguay. Pesquisa Agropecuaria Brasileira. 34, 6 (Jun. 1999), 1011–1017. DOI:https://doi.org/10.1590/S1678-3921.pab1999.v34.5281.