1. Biodemography of human ageing;Vaupel;Nature,2010
2. Total hip arthroplasties in the elderly. Morbidity, mortality, and cost effectiveness;Boettcher;Clin Orthop Relat Res,1992
3. Outcome of hip and knee arthroplasty in persons aged 80 years and older;Brander;Clin Orthop Relat Res,1997
4. Total hip arthroplasty in patients 80 years of age and older;Ekelund;Clin Orthop Relat Res,1992
5. Outcome and long-term results following total hip replacement in elderly patients;Levy;Clin Orthop Relat Res,1995