1. Vomiting;Li,1999
2. Green vomiting in the first 72 hours in normal infants;Lilien;Am J Dis Child,1986
3. Dreisbach's Handbook of Poisoning;Martin,2001
4. Pediatric Surgery;O'Neill,1998
5. Value of ultrasound in differentiating causes of persistent vomiting in infants;Rollins;Gut,1991