MADHALA, K.; KUMAR, G. N.; PADMA, M. N.; PARASA, S. K. Evaluation of analgesia by epidural Fentanyl and MgSO4 with Fentanyl for postoperative analgesia in patients of lower abdominal surgeries: A comparative study. International journal of health sciences, [S. l.], v. 6, n. S6, p. 10390–10399, 2022. DOI: 10.53730/ijhs.v6nS6.12771. Disponível em: https://www.sciencescholar.us/journal/index.php/ijhs/article/view/12771. Acesso em: 16 jul. 2026.