Fontaneli, Renato Serena, et al. “Soybean Yield and Nodulation in Different Annual Winter Crops under No-Tillage”. Pesquisa Agropecuaria Brasileira, vol. 35, no. 2, Feb. 2000, pp. 349-55, doi:10.1590/S1678-3921.pab2000.v35.5760.