N. Tipsunthonsak, T. Piriyasupong, and A. Piriyaskanon, “Efficacy of Biliary Stent Drainage and Factors Associated with Complications in Endoscopic Palliative Treatment of Patients with Hilar Cholangiocarcinoma”, Thai J Surg, vol. 32, no. 1, pp. 26–34, Mar. 2011.