Dileep Kumar, Kamal Kumar, and Mohammad Hamid. “Comparison of Perioperative Analgesia Between Intravenous Paracetamol and Fentanyl for Rigid Hysteroscopy. A Randomised Control Trial”. Journal of the Pakistan Medical Association, vol. 71, no. 8, Dec. 2021, pp. 1980-3, doi:10.47391/JPMA.02-250.