Wroblewski, B. M., Siney, P. D., & Fleming, P. A. (2007). Charnley low-frictional torque arthroplasty in young rheumatoid and juvenile rheumatoid arthritis: 292 hips followed for an average of 15 years. Acta Orthopaedica, 78(2), 206–210. https://doi.org/10.1080/17453670710013690