Rizzi, Rodrigo, and Bernardo Friedrich Theodor Rudorff. “MODIS Sensor Images Associated With an Agronomic Model to Estimate Soybean Grain Yield”. Pesquisa Agropecuaria Brasileira, vol. 42, no. 1, Jan. 2007, pp. 73-80, doi:10.1590/S1678-3921.pab2007.v42.7537.