An observational study to evaluate the effects of intravenous diclofenac in comparison to tramadol on early postoperative pain relief in patients following spinal anaesthesia. International Journal of Biomedical and Advance Research, [S. l.], v. 10, n. 10, p. e5420, 2019. Disponível em: https://ssjournals.co.in/index.php/ijbar/article/view/5420. Acesso em: 13 mar. 2025.