1. Movements of the lumbar spinal column;Allbrook;The Journal of Bone and Joint Surgery,1957
2. The reliability of determining the most abnormal lumbar joint using passive accessory intervertebral movements;Allen,1983
3. A combined flexi-rule/hydrogomometer for measurement of lumbar spine and its sagittal movement;Anderson;Rheumatology and Rehabilitation,1975
4. Bach TM (1985), An indirect method for measuring forces applied during therapeutic intervention and assessment techniques. Unpublished manuscript.
5. Interobserver reliability of range impairing stiffness ratings obtained from passive accessory intervertebral movements;Baker,1981