1. Primary retroperitoneal tumors;Herdman;Br. J. Surg.,1953
2. Primary retroperitoneal tumors: a report of 95 cases and a review of the literature;Donnelly;Surg. Gynecol. Obstet.,1946
3. Primary retroperitoneal tumors; a summation of 33 cases;Newman;Arch. Surg.,1950
4. Primary tumors of the retroperitoneum: A clinicopathologic analysis of 162 cases. Review of the literature and tables of classification;Melicow;J. Int. Coll. Surg.,1953
5. Collective review. Primary retroperitoneal tumors: a study of 120 cases;Pack;Surg. Gynecol. Obstet.,1954