1. 3Spector and Cooper;Lawrence,1977
2. Relationship between arthroscopic evidence of cartilage damage and radiographic evidence of joint space narrowing in early osteoarthritis of the knee;Fife, R.; Brandt, K.; Braunstein, E.;Arthritis Rheum,1991
3. Radiographic grading ofthe severity of knee osteoarthritis: relation ofthe Kellgren and Lawrence grade to a grade based on joint space narrowing, and correlation with arthroscopic evidence of articular cartilage degeneration;Brandt, K.D.; Fife, R.S.; Braunstein, E.M.; Katz, B.;Arthritis Rheum,1991
4. Comparison of visual and radiographic detection of bony changes at the knee joint;Rogers, J.; Watt, I.; Dieppe, P.;BMJ,1990
5. Quantitative radiography of osteoarthritis;Buckland-Wright, J.C.;Ann Rheum Dis,1994