1. Tumors of the Soft Tissues;Stout,1967
2. Primary retroperitoneal tumors;Newman;Arch. Surg.,1950
3. Retroperitoneal leiomyoma;Ohori;Acta Urol. Jap.,1964
4. Primary retroperitoneal tumors;Scanlan;J. Urol.,1959
5. Smooth muscle tumors of the gastrointestinal tract and retroperitoneal tissues;Golden;Surg. Gynecol. Obstet.,1941