AKDOĞAN, Meral, Erkan PARLAK, Burçak KAYHAN, Mevhibe BALK, Gül ERSAVAŞTF, and Burhan ŞAHİN. “Are Serum and Biliary Carcinoembryonic Antigen and Carbohydrate antigen19-9 Determinations Reliable for Differentiation Between Benign and Malignant Biliary Disease?”. Turkish Journal of Gastroenterology 14, no. 3 (January 3, 2003): 181–184. Accessed January 1, 2026. https://www.turkjgastroenterol.org/index.php/tjg/article/view/1265.