Latief, A., Tumbelaka, A., Suradi, R. and Taifur, W. 1999. Risk factors of upper gasterointestinal tract bleeding caused by stress ulcer. Paediatrica Indonesiana. 39, 1-2 (Feb. 1999), 20-8. DOI:https://doi.org/10.14238/pi39.1-2.1999.20-8.