Bibliografia

1) McCarron R.F., et al. Spine 12: 760, 1987.

2) Saal J.S., et al. Spine 16: 1821, 1995.

3) Spangfort E. Acta Orthop Scand suppl 142, 1972.

4) Jonsson B., Stromquist B. J Bone Joint Surg 75-B: 381, 1993.

5) Spengler M., et al. J Bone Joint Surg 72-A: 230, 1990.

6) Hansen H. Acta Orthop Scand 20: 28, 1951.

7) Berry R.G. J Bone Joint Surg 43-B: 387, 1961.

8) McNally D.S., et al. J Biomed Eng 14: 495, 1992.