1. Primary retroperitoneal tumors;Donnelly;Surg., Gynec. & Obst.,1946
2. Roentgen diagnosis of retroperitoneal lipoma;Windholz;Am. J. Roentgenol.,1946
3. Primary retroperitoneal tumors;Newman;Arch. Surg.,1950
4. Retroperitoneal cysts: their pathology, diagnosis and treatment;Handfield-Jones;Brit. J. Surg.,1924
5. Primary teratoma of the lateral retroperitoneal spaces;Palumbo;Surgery,1949