Fibroblastic variant of Osteosarcoma: A Diagnostic Challenge . Journal of Pharmaceutical Negative Results, [S. l.], p. 508–511, 2023. DOI: 10.47750/pnr.2023.14.03.063. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/8006.. Acesso em: 12 jun. 2026.