1. Howell DS. Etiopathogenesis of Osteoarthritis. In: Arthritis and Allied Conditions (11th Edition) Ed. McCarty DJ. Philadelphia, Lea & Febiger. 1989:1595–1604.
2. Felson DT. Osteoarthritis. In: Rheumatic Disease Clinics of North America. Ed. Hochberg MC. Philadelphia, W.B. Saunders Co. 1990;16(3):499–512.
3. van Saase JLCM, van Romunde LKJ, Cats A, Vandenbroucke JP and Valkenburg HA. Epidemiology of osteoarthritis: Zoetermeer survey. Comparison of radiological osteoarthritis in a Dutch population with that in 10 other populations. Ann Rheum Dis 1989;48:271–280.
4. Hough Jr AJ and Sokoloff L. Pathology of Osteoarthritis. In: Arthritis and Allied Conditions (11th Edition). Ed. McCarty DJ. Philadelphia, Lea & Febiger. 1989:1571–1594.
5. Ehrlich GE. Erosive inflammatory and primary generalized osteoarthritis. In: Osteoarthritis — Diagnosis and Management. Eds. Moskowitz RW, Howell DS, Goldberg VM and Mankin HJ. Philadelphia, W.B. Saunders Co. 1984:199–209.