Carvalho, Claudio Guilherme Portela de, et al. “Proposal to Categorize Coefficients of Variation for Yield and Plant Height in Soybean”. Pesquisa Agropecuaria Brasileira, vol. 38, no. 2, Feb. 2003, pp. 187-93, doi:10.1590/S1678-3921.pab2003.v38.6559.