Ülkü SARITAŞ, E. ALTIPARMAK, U. YILMAZ, S. KÜÇÜKBAŞ, and G. TEMUÇiN, “Cholelithiasis, Cholecystectomy and Colorectal Cancer”, Turkish Journal of Gastroenterology, vol. 5, no. 4, pp. 667–670, Jan. 1994.