1. Definition and classification of osteoarthritis;Flores,1998
2. Etiopathogenesis of osteoarthritis;Howell,1992
3. Principles of drug therapy;Batchlor,1992
4. Viscoelastic properties of hyaluronic acid and biological lubrication;Balazs;Univ Mich Med Ctr J,1968
5. The physical properties of synovial fluid and the special role of hyaluronic acid;Balazs,1982