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Oxland, T R; Lund, T; Jost, B; Cripton, P; Lippuner, K; Jaeger, P; Nolte, L P (1996). The relative importance of vertebral bone density and disc degeneration in spinal flexibility and interbody implant performance. An in vitro study. Spine, 21(22), pp. 2558-69. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/00007632-199611150-00005
Berlemann, U; Cripton, P; Nolte, L P; Lippuner, K; Schläpfer, F (1995). New means in spinal pedicle hook fixation. A biomechanical evaluation. European spine journal, 4(2), pp. 114-22. Berlin: Springer 10.1007/BF00278923
