References
- Elftman H. The force exerted by the ground in walking. Arbeitsphysiol 1939; 10: 485–491
- Jacobs N. A., Skorecki J., Charnley J. Analysis of the vertical component of force in normal and pathological gait. Journal of Biomechanics 1972; 5(1)11–34
- Shoup T. E., Fletcher L. S., Merrill B. R. Biomechanics of crutch locomotion. Journal of Biomechanics 1974; 7: 11–19
- British Standards Institution: BS 4997. Specification for Wooden Axilla Crutches. British Standards Institution, London 1973
- British Standards Institution: BS 4988. Specification for Elbow Crutches. British Standards Institution, London 1973