Yilmaz, G., Y. Tanrikulu, and B. Goksoy. “Physio-Pathological Risk Factors from Gallbladder Affecting the Conversion from Laparoscopic Cholecystectomy to Open Cholecystectomy”. Annals of Medical Research, vol. 28, no. 4, May 2021, pp. 0837-41, http://www.annalsmedres.org/index.php/aomr/article/view/442.