MISHRA, O.; SEHRAWAT, S.; DEY, S. To compare the effects and efficacy of 0.5% hyperbaric levobupivacaine with fentanyl versus 0.5% hyperbaric bupivacaine with fentanyl for subarachnoid block in elderly patients undergoing elective surgeries. International Journal of Research in Medical Sciences, [S. l.], v. 14, n. 10, p. 4579–4584, 2026. DOI: 10.18203/2320-6012.ijrms20263526. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/17310. Acesso em: 30 sep. 2026.