Roy, A., P. N. Datta, and K. Guha. “Role of a Modified Epigastric Port in Reducing Post Operative Pain and Causing Early Ambulation in a Patient Undergoing Laparoscopic Cholecystectomy As Compared to a Standard Four Port Procedure, a Randomized Controlled Study”. International Surgery Journal, vol. 7, no. 12, Nov. 2020, pp. 3986-93, doi:10.18203/2349-2902.isj20205019.