Methasate, A. ., W. . Pongpanich, T. . Akaraviputh, S. . Leelakusolvong, W. . Boonnuch, . V. . Lohsiriwat, and D. Lohsiriwat. “Endoscopic Endoprosthesis Insertion in Unresectable Hilar Cholangiocarcinoma Patient”. Siriraj Medical Journal, vol. 58, no. 2, Feb. 2006, pp. 640-3, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245697.