KISHNANI, P.; JAIN, L. K.; PATEL, K.; CHAUHAN, D. A study of intrathecal fentanyl and butorphanol as an adjuvant to 0.5% bupivacaine [heavy] for lower limb surgeries: Randomized control study. International journal of health sciences, [S. l.], v. 6, n. S3, p. 1600–1608, 2022. DOI: 10.53730/ijhs.v6nS3.5709. Disponível em: https://sciencescholar.us/journal/index.php/ijhs/article/view/5709. Acesso em: 17 nov. 2024.