Corrêa, Juliano Corulli, et al. “Surface Application of Flue Dust, Aqueous Lime, Sewage Sludge and Limestone on Soybean Crop”. Pesquisa Agropecuaria Brasileira, vol. 43, no. 9, Oct. 2008, pp. 1209-1, doi:10.1590/S1678-3921.pab2008.v43.100.