Iftikhar, Hina, et al. “Appraisal of the Effect of Norepinephrine Versus Phenylephrine on Blood Pressure and Heart Rate During Spinal Anaesthesia for a Caesarean Section; A Quasi-Experimental Study”. Pakistan Armed Forces Medical Journal, vol. 72, no. 4, Sept. 2022, pp. 1324-28, https://doi.org/10.51253/pafmj.v72i4.7674.