1. 2) Park GT, Tabah EJ. Primary retroperitoneal tumors: a study of 120 cases. Int Abstr Surg. 1954;99:313–341.
2. 4) Fine G, Raju U. Retroperitoneum, mesentery, omentum, and peritoneum. In: Silverberg SG editor. Surgical pathology. New York: Churchill Livingstone; 1990. p. 991–1017.