A. BEDİRLİ, E. M. SÖZÜER, Ömer ŞAKRAK, H. BABAYİĞİT, and Z. YILMAZ, “Comparison of the results of early, delayed and elective surgery in biliary pancreatitis”, Turkish Journal of Gastroenterology, vol. 14, no. 2, pp. 97–101, Jan. 2003.