1. Accident Facts (1973) National Safety Council, Chicago. p. 30.
2. Degenerative joint disease;Altman;Clinics in Rheumatic Diseases,1983
3. Experimental and pathological studies in the degenerative type of arthritis;Bauer;Journal of Bone and Joint Surgery,1936
4. Bennett GA, Waine H & Bauer W (1942) Changes in the Knee Joint at Various Ages. Boston: Commonwealth Fund.
5. Pain in the neck and arm: a multicentre trial of the effects of physiotherapy;British Association of Physical Medicine;British Medical Journal,1966