Kumar Shukla, Ajay, and Arun Kumar Srivastav. “Comparative Study of Tramadol and Diclofenac As Analgesic for Postoperative Pain”. International Journal of Medical Research and Review 3, no. 11 (December 31, 2015): 1311-1316. Accessed April 22, 2021. https://ijmrr.medresearch.in/index.php/ijmrr/article/view/412.