Gupta N, Jain P, Kapadia M, Sanwatsarkar S, Saxena D, Maheshwari M. The effect of 0.25% levobupivacaine and 0.25% ropivacaine in fascia iliaca block in elderly patients with fracture femur given before positioning for subarachnoid block. Int J Res Med Sci [Internet]. 2017 Dec. 23 [cited 2025 Sep. 26];6(1):191-4. Available from: https://www.msjonline.org/index.php/ijrms/article/view/4171