1. Maruo, Takuya, Takuo Shida, Yasuhiro Fukuyama, Yasunori Hino, Toru Yamada, and Hiroo Madarame. Evaluation of intraoperative radiation therapy for incompletely resected or recurrent canine hemangiopericytoma: seventeen cases. Int J Appl Res Vet M 10 2012: 132-136.
2. Handharyani E, Ochiai K, Kadosawa T, Kimura T, Umemura T. Canine hemangiopericytoma: an evaluation of metastatic potential. J Vet Diagn Invest. 1999;11(5):474-8.
3. Blutke A, Knebel J, Brühschwein A, Breuer W, Hermanns W. Hemangiopericytoma in a cat: a case report. Vet Med-Czech. 2012;57(5).
4. Silva EOd, Romero F, Green KT, Martins MIM, Bracarense APFRL. Hemangiopericytoma in a female dog with direct invasion of abdominal cavity and pulmonary metastasis. Cienc Rural. 2014;44(2):358-61.
5. Baldi A, Spugnini EP. Thoracic haemangiopericytoma in a cat. Vet Rec. 2006;159(18):598-600.
6. Perez J, Bautista MJ, Rollon E, Lara FCn-Md, Carrasco L, Mulas JMndl. Immunohistochemical characterization of hemangiopericytomas and other spindle cell tumors in the dog. Vet Pathol. 1996;33(4):391-7.
7. Richardson RC, Render JA, Rudd RG, Shupe RE, Carlton WW. Metastatic canine hemangiopericytoma. Javma-J Am Vet Med A. 1983;182(7):705-6.
8. Pantekoek J, Schiefer B. Metastasising canine fibrosarcoma originally diagnosed as haemangiopericytoma. J Small Anim Pract. 1975;16(12):259-65.
9. Postorino NC. Prognostic variables for canine hemangiopericytoma: 50 cases (1974-1984). J Am Anim Hosp Assoc. 1988;24:501-9.
10. Bostock DE, Dye MT. Prognosis after surgical excision of canine fibrous connective tissue sarcomas. Vet Pathol. 1980;17(5):581-8.
11. Schenck PA, Chew DJ, Nagode LA, Rosol TJ. Disorders of calcium: hypercalcemia and hypocalcemia. Fluid, electrolyte, and acid-base disorders in small animal practice. 2006;4:120-94.
12. Trojani M, Contesso G, Coindre JM, Rouesse J, Bui NB, De Mascarel A, et al. Soft tissue sarcomas of adults; study of pathological prognostic variables and definition of a histopathological grading system. Int J Cancer. 1984;33(1):37-42.
13. Gross TL, Ihrke PJ, Walder EJ, Affolter VK. Mesenchymal neoplasms and other tumors. Skin diseases of the dog and cat Clinical and Histopathologic Diagnosis 2nd ed, Blackwell Science, Oxford. 2005:722-7.
14. Nonaka D, Chiriboga L, Rubin BP. Differential expression of S100 protein subtypes in malignant melanoma, and benign and malignant peripheral nerve sheath tumors. J Cutan Pathol. 2008 Nov;35(11):1014-9.
15. Allen H. Hemangiopericytoma in the dog. 2003.
16. Graves GM, Bjorling DE, Mahaffey E. Canine hemangiopericytoma: 23 cases (1967-1984). Javma-J Am Vet Med A. 1988;192(1):99-102.