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”, Int. J. Heal. Clin. Res., vol. 4, no. 12, pp. 282–287, Jul. 2021.