Amen, A. ., P. . Bunnag, and K. . Kullabutr. “Optimization on Critical Parameters for Lyophilization of Reference Standard Viral Vaccines by Using Freeze-Drying Microscopy”. Thai Food and Drug Journal, vol. 28, no. 2, June 2021, pp. 41-50, https://he01.tci-thaijo.org/index.php/fdajournal/article/view/250317.