M. ERDOĞAN, S. YILMAZ, V. KIRIMLIOĞLU, and M. AKOĞLU, “AN IMPORTANT FACTOR AFFECTING MORTALITY AFTER SURGERY FOR OBSTRUCTIVE JAUNDICE: BILIRUBIN LEVEL”, Turkish Journal of Gastroenterology, vol. 4, no. 4, pp. 627–630, Jan. 1993.