Camargo, Antonio Pereira de, et al. “Effect of Liming on Yields of Five Successive Crops of Maize Followed by Cotton and Soybeans”. Pesquisa Agropecuaria Brasileira, vol. 17, no. 7, Apr. 2014, pp. 1007-12, doi:10.1590/S1678-3921.pab1982.v17.15979.