1. Calin A. Terminology, introduction, diagnostic criteria and overview, in the spondylarthritides, A. Calin, J. Taurog, ed. Oxford University Press: Oxford 1998:1–15.
2. Calin A. Textbook of Rheumatology. 3rd ed. WN Kelly, ED Harris, S Rudy, CD Sledge. Philadelphia: WB Saunders 1985:1021–1137.
3. Calin A. Oxford Textbook of Rheumatology, ed. Peter Maddison DI, Woo P, DN Glass. Oxford: Oxford University Press. 1993; Vol. 1:681–90.
4. Calin A, Marder A, Marks S et al, Familial aggregation of Reiter’s syndrome and ankylosing spondylitis: a comparative study. J Rheumatol 1984; 11:672–7.
5. Brewerton DA, Caffrey M, Hart FD et al. Ankylosing spondylitis and HLA-B27. Lancet 1973; 1:1103.