1. Ankylosing spondylitis;Hart,1949
2. Ankylosing spondylitis;Moll,1980
3. Zur Lowre von der Spondylitis deformans—Beitrag zur Wessenschafthicher medizin. Festschrift an den 59;Bencke,1897
4. The physiological oscillation of the length of the body;De Pukys;Acta Orthop Scand,1935
5. Changes in spinal stature following brief periods of static shoulder loading;Fitzgerald;Institute of Aviation Medicine Report No. 514,1972