1. Fact sheet: osteoarthritis. American College of Rheumatology, sept. 2008. Available: http://www.rheumatology.org/public/factsheets/osteoarthritis.asp?aud=prs.
2. Vertebral fractures in osteoporosis: a new method for clinical assessment, research group.;Genant,1995
3. Anterior osteophyte discrimination in lumbar vertebrae using size-invariant features;Cherukuri;Comput Med Imaging Graph,2004
4. Degenerative disk disease: assessment of changes in vertebral body marrow with MR Imaging;Modic;Radiology,1988
5. Plan and Operation of the second National Health and Nutrition Examination Survey 80 (1976), Programs and collection procedures, Series 1, No. 15, DHHS Publication No. (PHS) 81-1317, National Center for Health Statistics, Hyattsville, MD (July 1981) p. 4.