1. Barr, J. S., Kubik, C., Molloy, M., McNeill, M., Risebourgh, E., White, J., Evaluation of end results in treatment of ruptured lumbar intervertebral disk with protrution of nucleus pulposus. Surg. Gynec. Obst.125 (1967), 250–256.
2. Bradford, F. K., Spurling, R. G., The intervertebral disc, 2nd ed. Springfield, Ill.: Ch. C Thomas. 1945.
3. Burns, B. H., Young, R. H., Results of surgery in sciatic and low back pain. LancetI (1951), 245–249.
4. Christoferson, L. A., Selland, B., Intervertebral bone implants following excision of protruded lumbar discs. J. Neurosurg.42 (1975), 401–405.
5. Cloward, R. B., The treatment of ruptured lumbar discs by vertebral body fusion. J. Neurosurg.10 (1953), 154–168.