Fernandes, Maria Irene B. de M., et al. “The Causal Factors of Varietal Ununiformity in Wheat (<i>Triticum aestivum< I> (L.) Thell) and the Role of Chromosomal Instability”. Pesquisa Agropecuaria Brasileira, vol. 26, no. 3, Mar. 1991, pp. 353-69, doi:10.1590/S1678-3921.pab1991.v26.3351.