M. B. S. . Nagra, Bilal Saeed, Abdul Basit Samad, M Ajmal Leghari, Aoun Ayub Hashmi, and M Sheraz Abbasi, “Efficacy of Perianal Block versus Spinal Anesthesia in Patients Undergoing Perianal Procedures”, Pak Armed Forces Med J, vol. 76, no. 4, pp. 485–489, Aug. 2026, doi: 10.51253/pafmj.v76i4.12225.