1. Bisla et al. 67 total hip follow-up J Bone Joint Surg 1976, 58A, 1098.
2. Welch, R.B., Charnley, J. Low friction arthroplasty of the hip in rheumatoid arthritis and spondilitis ankylopoetica. Clin Orthop 1970, 72, 22–32.
3. Freeman, P., Mc Kee Farrar total replacements of the hip joint in rheumatoid arthritis and allied conditions. Clin Orthop 1970, 72, 106–14.
4. Sybrandy, S. Consensus totale heupprothese, Ned Tijdschr Gen 1988, 132, 578–82.
5. Cupi, Z. Long term follow-up of Charnly arthroplasty of the hip Clin Orthop 1979, 141, 28–43.