M. A. Amjad, “Comparison of Hemodynamic Stability in Patients with Intrathecal 0.75% Hyperbaric Bupivacaine Alone and with Pethidine”, Pak Armed Forces Med J, vol. 75, no. 3, pp. 487–490, Jun. 2025, doi: 10.51253/pafmj.v75i3.10848.