Lantmann, Aureo Francisco, et al. “Productivity of Wheat Following Non-Fetilized Soybean in a Dystrophic Dusky Red Latosol”. Pesquisa Agropecuaria Brasileira, vol. 32, no. 3, Mar. 1997, pp. 257-65, doi:10.1590/S1678-3921.pab1997.v32.4634.