References
- RA McKenzie: The Lumbar Spine: Mechanical Diagnosis and Therapy. Waikanae, New Zealand, Spinal Publications, 1981
- A Nachemson: Lumbar intradiscal pressure, in Jayson MIV (ed): The Lumbar Spine and Back Pain. Turnbridge Wells, England, Pitman Medical Publishing Co, 1980
- AA White. MM Panjabi: Clinical Biomechanics of the Spine. New York City, J B Lippincott Co, 1978