Moradi, S., Parsaei, A., Feyzollahi, R., Ahmadzadeh, H., Ahmadzadeh, K., & Alimadadi, H. "Endoscopic Findings and Associated Factors in Children with Hematemesis", Journal of Pediatric Perspectives, 9, 2, 2021, 12999-13004. doi: 10.22038/ijp.2021.54409.4303