Susanto, F. M., Hegar, B. and Firmansyah, A. (2007) “Upper Gastrointestinal Endoscopy and Histopathology Appearance in Indonesian Children with Recurrent Epigastric Pain”, The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 8(3), pp. 67–70. doi: 10.24871/83200767-70.