Radl, Roman, Marc Hungerford, Wilfried Materna, Peter Rehak, and Reinhard Windhager. 2005. “Higher Failure Rate and Stem Migration of an Uncemented Femoral Component in Patients With Femoral Head Osteonecrosis Than in Patients With Osteoarthrosis”. Acta Orthopaedica 76 (1):49-55. https://doi.org/10.1080/00016470510030319.