Hassam, Hafiz Ahmed, et al. “Comparison of Hemodynamic Changes With Fentanyl and Lignocaine As Adjuvant Agents During Induction of Anesthesia”. Pakistan Armed Forces Medical Journal, vol. 75, no. 2, Apr. 2025, pp. 240-4, https://doi.org/10.51253/pafmj.v75i2.7573.