Fernandes, Diego Simões, Alexandre Bryan Heinemann, Rosidalva Lopes Feitosa Paz, and André de Oliveira Amorim. 2011. “Performance of Quantitative Drought Indices in the Upland Rice Yield Estimates”. Pesquisa Agropecuaria Brasileira 45 (8):771-79. https://doi.org/10.1590/S1678-3921.pab2010.v45.8239.