Carvalho, Hélio Wilson Lemos de, et al. “Three Cycles Selection Among and Within Half Sib Progenies in the Maize Population CMS-52”. Pesquisa Agropecuaria Brasileira, vol. 35, no. 8, Aug. 2000, pp. 1621-8, doi:10.1590/S1678-3921.pab2000.v35.5940.