References
- Michelson J, Easley M, Wigley FM, Hellmann D. Foot and ankle problems in rheumatoid arthritis. Foot Ankle Int 1994;15:608–13.
- Reeves, B. Development of an os calcaneal spur in a boy between the ages of 10 and 14 years. Ann Rheum Dis 1965;24:66–7.