1. 1. Nashner LM: Practical biomechanics and physiology of balance. In: Handbook of balance function testing, London: Singular Publishing Group, 1997, pp 261–279.
2. 2. Whipple R, Wolfson LI: Abnormalities of balance, gait, and sensorimotor function in the elderly population. In Duncan, P.W. (Ed.), Balance: Proceedings of the APTA Forum, American Physical Therapy Association, Alexandria: VA Co, 1989, pp 61–68.
3. 3. O’sullivan SB, Schmize TJ: Physical rehabilitation; Assessment and treatment. Philadelphia: F.A. Davis Co, 2001, pp 529–564.
4. 4. Son JC: The effects of ankle strength exercise on the ability of balance control of patients with stroke. Unpublished master’s thesis, Yong In University, Yong In, 2005, pp 10–22.
5. 5. Kauffman TL, Nashner LM, Allison LK: Balance is a critical parameter in orthopedic rehabilitation, Orthopaedic Physical Therapy Clinics of North America. Tech Phys Ther, 1997, 6: 1059–1516.