Ferreira, Jorge Luís, et al. “Estimation of (co)variances for Growth Traits in Nellore Cattle Raised in the Humid Tropics of Brazil by Random Regression”. Semina: Ciências Agrárias, vol. 36, nº 3, junho de 2015, p. 1713-24, doi:10.5433/1679-0359.2015v36n3p1713.