Chuamor, K., and J. Thongdonjuy. “Effectiveness of Standard Nursing Care With Gum Chewing to Reduce Bowel Ileus in Post-Operative Gynecologic Patients: Randomized Controlled Trials”. Siriraj Medical Journal, vol. 66, no. 2, Mar. 2014, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/55293.