Maharjan, S. “The Haemodynamic and Ventilatory Responses With I-Gel, Laryngeal Mask Airway and Tracheal Intubation During Laparoscopic Cholecystectomy”. Journal of Kathmandu Medical College, vol. 1, no. 2, May 2013, pp. 84-90, https://jkmc.com.np/ojs3/index.php/journal/article/view/498.