Sangkamanee, P. ., W. Chanchai, T. Nimnaparoj, R. Sutthichienchot, S. Srithanyarat, C. Jindarat, . K. . Bunnum, P. Suksawat, and S. . Srisua. “Evaluation of the Physical Performance of Chemical Indicators in the Sterilization Process under the Operation of the Pre-Vacuum Pump System of the Steam Sterilizer”. 2024. Journal of Health Promotion and Environmental Health Research Health Promotion Centre 8 Udon Thani, vol. 2, no. 4, Oct. 2024, pp. 52-62, https://he04.tci-thaijo.org/index.php/hpc8Journal/article/view/1254.