“Comparative study between transdermal buprenorphine patch with intravenous tramadol for post-operative analgesia in laparotomy cases”, AJPHS, vol. 7, no. 1, pp. 1613–1617, Mar. 2017, Accessed: Mar. 13, 2026. [Online]. Available: https://ajphs.com/index.php/ajphs/article/view/306