Marques, Heden Luiz, and Ricardo Alberto Cardellino. “Heritability, Repeatability and Environment Effects in Hereford Cattle. I - Weaning Weight and Conformation Score”. Pesquisa Agropecuaria Brasileira, vol. 29, no. 11, Nov. 1994, pp. 1795-00, doi:10.1590/S1678-3921.pab1994.v29.4236.