Bugalia, Rajendra Prasad, Anuradha Salvi, Prashant Garg, Abhinav Pandey, and Raj Kamal Jenaw. 2015. “Presacral Hemangiopericytoma: Case Report”. International Journal of Advances in Scientific Research 1 (4): 211-13. https://doi.org/10.7439/ijasr.v1i4.1820.