Kumkum Gupta, Bhawana Rastogi, Prashant K Gupta, Manoranjan K Bansal, Pavitra Kalra, and Sukhreet Kaur, “Perfusion Index to Assess Hemodynamic Changes and Analgesia with Premedication of Fentanyl versus Nalbuphineduring General Anesthesia”, AAN, vol. 4, no. 2, pp. 255-259, Dec. 2019.