Baraibar, Amalia, et al. “Symbiotic Effectiveness and Ecological Characterization of Indigenous Rhizobium Loti Populations in Uruguay”. Pesquisa Agropecuaria Brasileira, vol. 34, no. 6, June 1999, pp. 1011-7, https://doi.org/10.1590/S1678-3921.pab1999.v34.5281.