Nurdan Kotevoğlu, et al. “COMPARISON OF RADIOGRAPHIC PATTERNS OF KNEE OSTEOARTHRITIS IN TURKISH AND BRITISH PATIENTS: RELATIONSHIP BETWEEN SYMPTOMS AND DISABILITY”. Archives of Rheumatology, vol. 19, no. 2, June 2004, pp. 093-8, http://anadolupsikiyatri.net/index.php/pub/article/view/135.