M. M. F. Nadeem, W. A. Kazi, and S. K. Janjua, “HEMODYNAMIC RESPONSE OF LOW DOSE BUPIVACAINE WITH FENTANYL SPINAL ANESTHESIA IN ELDERLY PATIENTS: Low Dose Bupivacaine”, Pak Armed Forces Med J, vol. 62, no. 3, pp. 404–8, Sep. 2012, Accessed: Feb. 22, 2025. [Online]. Available: https://pafmj.org/PAFMJ/article/view/1623