1. Moll J M H, ed. Ankylosing spondylitis. Edinburgh: Churchill Livingstone, 1980.
2. Seronegative spondyloarthropathies;C, Arnette F.;Bull Rheunm Dis,1987
3. Rontgenbilden vid spondylarthritis ankylopoetica;0, Andersson;Nord Med,1937
4. Is spondylarthritis ankylopoietica an independent disease or a rheumatic syndrome?;Edstrom, G.;Acta Med Scand,1940
5. Destructive lesions of vertebral bodies in ankylosing spondylitis;D, Cawley M.I.; M, Chalmers T.; H, Kellgren J.; J, Ball;Ann Rheum Dis,1972