Ríos-Utrera, Ángel, Calderón-Robles, R. C., Rosete-Fernández, J. V., & Lagunes-Lagunes, J. (2010). Genetic and phenotypic correlations among reproductive traits of dairy cows. Agronomía Mesoamericana, 21(2), 235–244. https://doi.org/10.15517/am.v21i2.11835