“Haemodynamic Effects and Complications of Unilateral Spinal Versus Standard Spinal Anesthesia in Elderly With Low Ejection Fraction Undergone Lower-Limb Surgery”. Delta Medical College Journal 5, no. 1 (February 4, 2017): 20–24. Accessed June 29, 2026. https://banglajol.info/index.php/DMCJ/article/view/31426.