Thuy Van, N. T., P. Truong Duy, N. V. Thuan, and B. H. Thuy. “Caffeine Improves the Developmental Competence of Parthenogenetic Embryos Derived from Aging Porcine Oocytes”. Vietnam Journal of Biotechnology, vol. 17, no. 4, Nov. 2020, pp. 629-36, doi:10.15625/1811-4989/17/4/14187.