1. Destruction of the odontoid process due to axial pyogenic spondylitis;Ahlback;Acta Radiol. (Diagn.) (Stockh.),1970
2. The normal cervical spine in infants and children;Bailey;Radiology,1962
3. Aplasia of the odontoid process;Bassett;J. Bone Joint Surg.,1968
4. Spinal cord compression in Morquio-Brailsford's disease;Blaw;J. Pediat.,1969
5. Paediatric X-ray Diagnosis;Caffey,1967