Mishra, O., Sehrawat, S. and Dey, S. (2026) “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, 14(10), pp. 4579–4584. doi: 10.18203/2320-6012.ijrms20263526.