Velásquez, A.E., Manríquez, J.R., Castro, F.O. and Rodríguez-Alvarez, L. l. 2013. Effect of zona pellucida removal on early development of in vitro produced bovine embryos. Archivos de Medicina Veterinaria. 45, 1 (Apr. 2013), 7–15. DOI:https://doi.org/10.4067/S0301-732X2013000100003.