1. The human spine in health and disease;Schmorl,1971
2. Chiropractic management of spine related disorders;Gatterman,2002
3. Strength of the cervical spine in compression and bending;Przybyla;Spine,2007
4. Embryology and development;Collins,1995
5. Development of chiropractic nomenclature through consensus;Gatterman;J Manipulative Physiol Ther,1994