Machado, Eduardo Caruso, and Antonio Roberto Pereira. “Conversion Efficiency and Maintenance Coefficient in the Whole Plant, Roots and Tops in Maize and Rice under Aluminum Stress”. Pesquisa Agropecuaria Brasileira, vol. 25, no. 6, Apr. 2014, pp. 845-5, doi:10.1590/S1678-3921.pab1990.v25.13508.