Vaenthaisong, P., J. Angskun, and T. Angskun. “REDUCING THE SERVICE TIME FOR PSYCHIATRIC HOSPITALS USING SIMULATION TECHNIQUE”. Academic Psychiatry and Psychology Journal, vol. 34, no. 1, Dec. 2017, pp. 15-32, https://he01.tci-thaijo.org/index.php/APPJ/article/view/78251.