1. Conlon, P. W., Isdale, I. C., and Rose, B. S. (1966). Ann. rheum. Dis., 25, 120 (Rheumatoid arthritis of the cervical spine).
2. Kellgren, J. H., and Lawrence, J. S. (1956). Ibid., 15, 1.
3. (The occipito-atlanto-axial joints in rheumatoid arthritis and ankylosing spondylitis);Martel, W.;Amer. J. Roentgenol,1961
4. In "Radiological Aspects of Rheumatoid Arthritis, Amsterdam, 1963";Martel, W.;Excerpta Medica International Congress Series No,1964
5. Serre, H., Simon, L., Janicot, J.-Y., and Levy, F. (1964). Presse mid., 72, 213 (La luxation atloldoaxoldienne: complication frequente de la polyarthrite chronique rhumatismale).