Vicente-Pérez, R.; Osorio-Marín, Y.; López-Baca, M. de los A.; Avendaño-Reyes, L.; Correa-Calderón, A.; Mellado, M.; Lara-Rivera, A. L.; Meza-Herrera, C. A.; Macias-Cruz, U. Peri-Conceptional Undernutrition in Twin Bearing Ewes: Effect on Early Fetal Growth and Birth Weight. Ecosist. Recur. Agropec. 2017, 4, 419-429.