1. Hemangiopericytoma of retroperitoneal space;Ackerman L. V.;J. Missouri Med. Asso.,1948
2. Hemangiopericytoma of the sigmoid colon;Ault G. W.;Surgery,1951
3. Hemangiopericytoma occurring in the meninges.Case report
4. Therapy of hemangiopericytoma with pulmonary metastases;Bogedain W.;Lancet,1967
5. Hemangiopericytoma (glomus tumor) of the Mediastinum;Fergeson J. D.;Surgery,1954