1. Hemangiopericytoma, vascular tumor featuring Zimmermann's pericytes;Stout;Ann Surg,1942
2. Hemangiopericytoma, an analysis of 106 cases;Enzinger;Hum Pathol,1976
3. Soft tissue tumors;Enzinger,1983
4. Unusual laryngeal problems in children;Jaffe;Ann Otol,1973
5. Tumors featuring pericytes, glomus tumor and hemangiopericytoma;Stout;Lab Invest,1956