Kovachev V, Stokov L, Kovachev M, Simeonov E, Georgiev G. Primary fibrosarcoma of the distal femur. Report of a rare case. JBOTA [Internet]. 2022 Dec. 11 [cited 2026 Oct. 10];59(03):151-7. Available from: https://jbota.org/index.php/jbota/article/view/43