Ahmet UYGUN, N. Kemal NAZAROĞLU, Celalettin ÇETİN, Ahmet ERDİL, Sait BAĞCI, Mustafa GÜLŞEN, Cengiz KAYAHAN, Necmettin KARAEREN, and Kemal DAĞALP. 2019. “Bile and Serum Carcinoembryonic (CEA) Levels in Biliary Tract Diseases”. Turkish Journal of Gastroenterology 10 (3):287-90. https://tjg.avesjournals.com/index.php/tjg/article/view/1596.