Dhiman, Shweta, et al. “Magnesium Sulfate and Fentanyl for Facilitating Awake Fiberoptic Nasotracheal Intubation: A Randomized Study”. Annals of Anesthesiology and Critical Care, vol. 4, no. 1, Aug. 2019, pp. 1-6 (e90482), https://journals.sbmu.ac.ir/index.php/anescc/article/view/33287.