1. The incidence of acquired and congenital fusions in the cervical spine;Brown;AM J Roentgenol,1964
2. Congenital fusion of the cervical vertebrae;Gray;Surg Gynec Obstet,1964
3. Klippel-Feil syndrome;McElfresh;Minn Med,1973
4. Developmental abnormalities of the cervical spine below the axis;Dolan;Rad Clin North Am,1977
5. The Spine, A Radiological Text and Atlas;Epstein,1976