Oliveira, Patrícia Perondi Anchão, et al. “Interactions of Cultivars, Commercial Strains of Rhizobium Meliloti and Fungicides on the Production of Alfalfa”. Pesquisa Agropecuaria Brasileira, vol. 34, no. 3, Mar. 1999, pp. 425-31, https://doi.org/10.1590/S1678-3921.pab1999.v34.5191.