E. Alper, S. Akay, Z. BUYRAÇ, F. Aslan, I. ALPER, and B. Ünsal, “Endosonography and magnetic resonance cholangiopancreatography show similar efficacy in selecting patients for ERCP in mild-moderate acute biliary pancreatitis”, Turkish Journal of Gastroenterology, vol. 23, no. 5, pp. 580–584, Jan. 2012.