Karim, M. E. ., M. S. . Akram, R. M. . Rashid, and R. . Ershad. “Comparison Between Effects of Fentanyl and Ketofol As Sedative in Elective Caesarean Section under Subarachnoid Anaesthesia”. Delta Medical College Journal, vol. 8, no. 2, Aug. 2020, pp. 67-74, doi:10.3329/dmcj.v8i2.66622.