1. Sturman MF.Medical imaging in acute abdominal pain.Compr Ther1991; 17:15-21.
2. Abdominal pain
3. DeDombal FT.Diagnosis of acute abdominal pain2nd ed. New York, NY: Churchill Livingstone, 1991.
4. Anyanwu AC, Moalypour SM.Are abdominal radiographs still overutilized in the assessment of acute abdominal pain? A district general hospital audit.J R Coll Surg Edinb1998; 43:267-270.
5. Levine MS.Plain film diagnosis of the acute abdomen.Emerg Med Clin North Am1985; 3:541-562.