Chumnandee, C., S. Sirimungkararat, W. Saksirirat, and K. Srijankam. “Effects of polyvinyl alcohol on vitrification of mature and immature bovine oocytes”. Asia-Pacific Journal of Science and Technology, vol. 22, no. 4, Dec. 2017, pp. APST-22, doi:10.14456/apst.2017.33.