Salah, Sami E. E., and Hawa Yahia. “Gall Bladder Wall Thickness As a Predictor for Laparoscopic Cholecystectomy Difficulties in Gadarif, Eastern Sudan”. European Journal of Clinical Medicine 2, no. 3 (July 24, 2021): 158–163. Accessed February 13, 2025. https://www.ej-clinicmed.org/index.php/clinicmed/article/view/77.