MUKHOPADHYAY, B.; SINGH, S. S.; ., N.; KOBING, S.; XAVIER, A.; K., V. A comparative study between intrathecal fentanyl and intrathecal buprenorphine as adjuvants to 0.5% hyperbaric bupivacaine in females undergoing lower segment caesarean section under spinal anesthesia: a randomized and double blinded study. International Journal of Research in Medical Sciences, [S. l.], v. 12, n. 5, p. 1529–1534, 2024. DOI: 10.18203/2320-6012.ijrms20241237. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/13229. Acesso em: 13 oct. 2025.