1. Hemangiopericytoma-like intranasal tumors. A clinicopathologic study of 23 cases;Compagno;Am. J. Clin. Pathol.,1976
2. Haemangiopericytoma-a dying breed? Reappraisal of an `entity' and its variants: a hypothesis;Fletcher;Curr. Diagn. Pathol.,1994
3. Weiss SW Goldblum JR Enzinger and Weiss's soft tissue tumors
4. Ordonez BP Huvos AG Nonsquamous lesions of nasal cavity, paranasal sinuses, and nasopharynx Diagnostic surgical pathology of the head and neck,
5. Zarbo RJ Torres FX Gomez J Nasal cavity and paranasal sinuses Head and neck surgical pathology,