1. Enneking WF, Dunham W, Gebhardt MC, Malawar M, Pritchard DJ (1993) A system for the functional evaluation of reconstructive procedures after surgical treatment of tumours of the musculoskeletal system. Clin Orthop 286: 241–247
2. Fahrenberg J, Myrtek M, Schumacher J, Brähler E (2000) Fragebogen zur Lebenszufriedenheit (FLZ) – Handanweisung. Hogrefe: Göttingen
3. Fayers PM, Aaronson NK, Bjordal K, Groenvold M, Curran D, Bottomley A, on behalf of the EORTC Quality of Life Group (2001) The EORTC QLQ-C30 Scoring Manual, 3rd edn. Brussels: European Organization for Research and Treatment of Cancer
4. Legro MW, Reiber GE, Czerniecki JM, Sangeorzan BJ (2001) Recreational activities of lower-limb amputees with prostheses. J Rehabil Res Dev 38: 319–325
5. Nagarajan R, Neglia JP, Clohisy DR, Robison LL (2002) Limb salvage and amputation in survivors of pediatric lower extremity bone tumours: what are the long-term implications? J Clin Oncol 20: 4493–4501