Akhtar, Mohhamad Sadik, Parwez Alam, Yasir Alvi, Syed Amjad Ali Rizvi, and Mohhmad Habib Raza. “A Study of Factors Determining Difficult Surgery Among Patients Undergoing Laparoscopic Cholecystectomy”. International Surgery Journal 6, no. 9 (August 28, 2019): 3322–3327. Accessed November 10, 2025. https://www.ijsurgery.com/index.php/isj/article/view/4779.