Cargnelutti Filho, Alberto, et al. “Measurements of Experimental Precision and Number of Replicates in Rice Genotype Trials”. Pesquisa Agropecuaria Brasileira, vol. 47, no. 3, Apr. 2012, pp. 336-43, doi:10.1590/S1678-3921.pab2012.v47.11865.