Marques, H. L. and Cardellino, R. A. (1994) “Heritability, repeatability and environment effects in Hereford cattle. I - Weaning weight and conformation score”, Pesquisa Agropecuaria Brasileira, 29(11), pp. 1795–1800. doi: 10.1590/S1678-3921.pab1994.v29.4236.