1. Roentgenolic examination of acute appendicitis;Steinert;Acta Radiol,1943
2. Roentgenographic findings in acute appendicitis;Brooks;Surgery,1965
3. Radiology of acute appendicitis;Shimkin;Am J Roentgen,1978
4. Plain X-Ray in acute appendicitis;Rodrigues,2003
5. The plain abdominal radiograph in acute appendicitis;Thorpe;Ann R Coll Surg Engl,1979