1. Generalized osteoarthritis and heberden's nodes;H, Kellgren J.; R, Moore;BMJ,1952
2. Generalized osteoarthritis in a population sample;S, Lawrence J.;Am Epidemiol
3. Infirmary and the Empire Rheumatism Council's Field Unit. Atlas of Standard Radiographs of Arthritis. In: The epidemiology ofchronic rheumatism: volume II;of Rheumatology, The Department; Illustration, Medical; of Manchester, University; Royal, Manchester,1963
4. Collart A B. New Haven survey of joint diseases;M, Acheson R.;Ann Rheum Dis,1975
5. Study of 500 patients with limb joint osteoarthritis. I. Analysis by age, sex, and distribution of symptomatic joint sites;Cushnaghan, J.; Dieppe, P.;Ann Rheum Dis,1991