Kartal, Kinyas, and Mehmet Uludag. “Can 4-Port Laparoscopic Cholecystectomy Remain the Gold Standard for Gallbladder Surgery?”. Annali Italiani Di Chirurgia, vol. 87, no. 1, Jan. 2016, pp. 13-17, https://annaliitalianidichirurgia.it/index.php/aic/article/view/311.