1. Cotton P B. ERCP. Gut 1977; 18: 316-41.
2. Endoscopic retrograde cholangiopancreatography in the infant;D, Waye J.;Am J Gastroenterol,1976
3. Chronic relapsing pancreatitis in a child-endoscopic diagnosis;Alwmark, A.; Jonson, G.; Mattsson, K.;Acta Chir Scand,1977
4. Endoscopic retrograde cholangiopancreatography (ERCP) performed in children;Urakami, Y.; Seki, H.; Kishi, S.;Endoscopy,1977
5. Biliary ascariasis-endoscopic aspects;der Spuy S, Van;S Afr MedJ,1978