Freitas, Ismael Lourenço de Jesus, et al. “Genetic Gain Evaluated With Selection Indices and With REML Blup in Popcorn”. Pesquisa Agropecuaria Brasileira, vol. 48, no. 11, Feb. 2014, pp. 1464-71, doi:10.1590/S1678-3921.pab2013.v48.18110.