Rahman, M. M., M. M. Munir, - Raihanuddin, S. Shaheen, M. A. Khan, K. Sardar, and A. Chowdhury. “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, Vol. 5, no. 1, Feb. 2017, pp. 20-24, doi:10.3329/dmcj.v5i1.31426.