Ercüment H. TEKİN, et al. “Effect of Morphine, Ketorolac and Tenoxicam on Postoperative Small Intestinal Ileus in Rats”. Turkish Journal of Gastroenterology, vol. 10, no. 2, July 2019, pp. 143-6, https://tjg.avesjournals.com/index.php/tjg/article/view/1561.