Chida Shuichi, Nagasawa Hiroyuki, v Kyoji, and Shimada Yoichi. “Osteosarcoma of the Patella: A Case Report”. Upsala Journal of Medical Sciences 117, no. 3 (December 27, 2011). Accessed June 30, 2022. https://ujms.net/index.php/ujms/article/view/6001.