“An observational study to evaluate the effects of intravenous diclofenac in comparison to tramadol on early postoperative pain relief in patients following spinal anaesthesia”, Int J of Biomed & Adv Res, vol. 10, no. 10, p. e5420, Oct. 2019, Accessed: Mar. 12, 2026. [Online]. Available: https://ssjournals.co.in/index.php/ijbar/article/view/5420