Cherdchoo-ngarm, P. ., . T. . Kolladaruengkri, S. . Chomchai, D. . Pisalsarakij, A. . Amornrat, and T. . Deechoo. “Measurement of Ethylene Oxide Gas and Calculation of a Safe Period for Contact at the Medical Sterilization Unit in Siriraj Hospital”. Siriraj Medical Journal, vol. 56, no. 3, Mar. 2004, pp. 129-34, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245503.