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. Int J Res Med Sci [Internet]. 2026 Sep. 29 [cited 2026 Sep. 30];14(10):4579-84. Available from: https://www.msjonline.org/index.php/ijrms/article/view/17310