1. Prolapsed intervertebral disc. A hyperflexion injury;Adams;Spine,1982
2. Anderson AB and Champion SHS (1988): Skin preparation for surface EMG. Proceedings of the Bicentennial National APA Conference Canberra, pp. 11–29.
3. Lumbar disc pressure and myoelectric back activity during sitting;Andersson;Scandinavian Journal of Rehabilitation Medicine,1974
4. Understand your backache: A guide to prevention, treatment and relief;Cailliet,1984
5. Clancy WG (1979): Low back pain in athletes–Symposium. The American Journal of Sports Medicine 7:361–369.