Budny, Agnieszka, Jakub Litak, Bartłomiej Kulesza, Wojciech Czyżewski, and Cezary Grochowski. “Ewing`s Sarcoma”. Journal of Education, Health and Sport 7, no. 6 (June 16, 2017): 265–272. Accessed May 2, 2025. https://apcz.umk.pl/JEHS/article/view/4534.