1. Paravertebral ossification in psoriatic arthritis;Bywaters, E.G.L.; Dixon, A.St J.;Ann. rheum. Dis,1965
2. Personal communication;Cloward, R.,1967
3. Ham, A. W., and Harris, W. R. (1956). Repair and transplantation of bone. In: Biochemistry and Physiology of Bone. P. 504. Edited by Geoffrey H. Bourne. Academic Press: New York. Kaplan, D. A., Plotz, C. M., Nathanson, L., and Frank, L. (1963). Cervical spine in psoriasis and psoriatic arthritis. Arthr. and Rheum., 6,281.
4. Calcification of the posterior longitudinal ligament: A cause of cervical myelopathy;Minagi, H.; Gronner, A.T.;Amer. J. Roentgenol,1969
5. Posterior paravertebral ossification causing cervical myelopathy. A report of eighteen cases;Onji, Y.; Akiyama, H.; Shimomura, Y.; Ono, K.; Hukuda, S.; Mizuno, S.;J. Bone Jt. Surg,1967