Aditya Samudrala, Md Shahbaz Alam, Vipin Kumar Varshney, Rohit Varshney, and Wasim Khursheed. 2021. “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 4 (12):282-87. https://www.ijhcr.com/index.php/ijhcr/article/view/1960.