Makemaharn, O., S. Phornwilardsiri, P. . Laokirkkiat, S. . Petyim, S. . Julvijitphong, S. . Suksompong, and R. Choavaratana. “A Comparison between Conventional Slow Freezing and Vitrification of Mouse Blastocysts using Cryo-E”. Siriraj Medical Journal, vol. 60, no. 6, Nov. 2008, pp. 349-52, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246509.