de Freitas, Alfredo Ribeiro, and Roland Vencvski. 1993. “Comparison of Methods for Estimating Components of Variance and Related Parameters of Multiple Traits in Cattle”. Pesquisa Agropecuaria Brasileira 28 (4):453-63. https://doi.org/10.1590/S1678-3921.pab1993.v28.3897.