Kumari, R., S. Prasad, and R. Kumar. “Assessment of Hemodynamic Parameters and Side Effects Associated With Laryngoscopy and Intubation Using Labetalol, Fentanyl and Normal Saline”. International Journal of Health and Clinical Research, vol. 4, no. 8, Apr. 2021, pp. 112-6, https://ijhcr.com/index.php/ijhcr/article/view/1424.