Özlem KÖKSAL, G. ÖZEREN, F. ÖZDEMİR, E. ARMAĞAN, Şule AYDIN, and T. AYYILDIZ, “Prospective validation of the Glasgow Blatchford scoring system in patients with upper gastrointestinal bleeding in the emergency department”, Turkish Journal of Gastroenterology, vol. 23, no. 5, pp. 448–455, Jan. 2012.