Aditya Samudrala, Md Shahbaz Alam, Vipin Kumar Varshney, Rohit Varshney, and Wasim Khursheed. “Medical Air-Oxygen Versus Nitrous Oxide-Oxygen: A Comparative Study in Patients Undergoing Laparoscopic Cholecystectomy under General Anaesthesia”. International Journal of Health and Clinical Research, vol. 4, no. 12, July 2021, pp. 282-7, https://www.ijhcr.com/index.php/ijhcr/article/view/1960.