Ríos-Utrera, Ángel, René Carlos Calderón-Robles, Jorge Víctor Rosete-Fernández, and Juvencio Lagunes-Lagunes. 2010. “Genetic and Phenotypic Correlations Among Reproductive Traits of Dairy Cows”. Agronomía Mesoamericana 21 (2):235-44. https://doi.org/10.15517/am.v21i2.11835.