Tayfun Altinok, M., T. Baysal, R. Kutlu, A. Sigirci, A. Alkan, O. Soysal, and B. Mizrak. “Case Report: Malignant Thigh Hemangiopericytoma With Thoracic Wall Metastasis”. Annals of Medical Research, vol. 9, no. 4, May 2021, pp. 0255-7, http://www.annalsmedres.org/index.php/aomr/article/view/2934.