Kunz, Jefferson Horn, et al. “Interception and Use of Solar Radiation by Maize, As Modifying Soil Tillage, Row Spacing and Irrigation Water Availability”. Pesquisa Agropecuaria Brasileira, vol. 42, no. 11, Nov. 2007, pp. 1511-20, doi:10.1590/S1678-3921.pab2007.v42.7727.