Longhi A, Errani C, De Paolis M, Mercuri M, Bacci G (Oktober 2006). »Primary bone osteosarcoma in the pediatric age: state of the art«. Cancer Treatment Reviews. 32 (6): 423–436. doi:10.1016/j.ctrv.2006.05.005. PMID16860938.
Longhi A, Errani C, De Paolis M, Mercuri M, Bacci G (Oktober 2006). »Primary bone osteosarcoma in the pediatric age: state of the art«. Cancer Treatment Reviews. 32 (6): 423–436. doi:10.1016/j.ctrv.2006.05.005. PMID16860938.