Yamada, Sirikan, Trichuk Sundo, and Norio Matsukura. 2003. “Detection of Helicobacter Bilis in Bile from Thai Patients With Adenocarcinoma of Biliary Tract”. The Thai Journal of Surgery 24 (2):39-44. https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/242955.