4Unni KK, Ivins JC, Beabout JW et al. Hemangioma, hemangiopericytoma, and hemangioendothelioma (angiosarcoma) of bone. Cancer 1971; 27(6): 1403-1414.
5Rodriguez-Gil Y, Gonzalez MA, Carcavilla CB et al. Lines of cell differentiation In solitary fibrous tumor: an ultrastructural and immunohistochemical study of 10 cases. Ultrastruct Pathol 2009; 33(6): 274-285.
6Stout AP, Murray MR. Hemangiopericytoma: a vascular tumor featuring Zimmer?mann's pericyte. Ann Surg 1942; 116(1): 26-33.
7Backwinkel KD, Diddams JA. Hemangiopericytoma. Report of a case and compre?hensive review of the literature. Cancer 1970; 25(4): 896-901.
8Enzinger FM, Smith BH. Hemangiopericytoma. An analysis of 106 cases. Hum Pathol 1976; 7(1): 61-82.
9O'brien P, Brasfield RD. Hemangiopericytoma. Cancer 1965; 18: 249-252.
10Hogle WP. Malignant hemangiopericytoma: a clinical overview and case study. Clin J Oncol Nurs 2003; 7(1): 57-62.
