Aamir Ghazanfar, Afifa Asghar, A. G. A. A. “Comparison of High Versus Low Intra-Peritoneal Carbon Dioxide Pressure on Abdominal Pain, Hemodynamic Symptoms and Liver Function Tests in Patients Undergoing Laparoscopic Cholecystectomy”. Journal of Rawalpindi Medical College, vol. 23, no. 2, May 2019, http://journalrmc.com/index.php/JRMC/article/view/1103.