Chanchai, Withaya. “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”. Journal of Health Promotion and Environmental Health Research Health Promotion Centre 8 Udon Thani 2, no. 4 (September 30, 2024): 52–62. accessed April 21, 2025. https://he04.tci-thaijo.org/index.php/hpc8Journal/article/view/1254.