1. Guides to the Evaluation of Permanent Impairment. American Medical Association. Chicago, IL.
2. Miller KJ: Range-of-Motion Testing: A Fresh Look . Journalof the American Chiropractic Association. Oct. 2003.
3. Dvorak J, Antinnes JA, Panjabi M, Loustalot D: Age and Gender Related Normal Motion of the Cervical Spine. Spine 17:10S 393-398, 1992.
4. McGregor AH, McCarthy ID, Hughes, SP: Motion Characteristics of the Lumbar Spine in the Normal Population. Spine 20:22 2421-2428, 1995