ÅKERMAN, Måns. Tumour necrosis and prognosis in Ewing’s sarcoma. Acta Orthopaedica, [S. l.], v. 68, n. sup273, p. 130–132, 1997. DOI: 10.1080/17453674.1997.11744718. Disponível em: https://actaorthop.org/actao/article/view/20916. Acesso em: 23 feb. 2025.