Salvador, I., A. Cebrian-Serrano, D. Salamone, and M. A. Silvestre. “Effect of Number of Oocytes and Embryos on in Vitro Oocyte Maturation, Fertilization and Embryo Development in Bovine”. Spanish Journal of Agricultural Research, Vol. 9, no. 3, 1, pp. 744-52, doi:10.5424/sjar/20110903-374-10.