1. Alexander, N.B., Schultz, A.B., Warwick, D.N.: Rising from a chair: effects of age and functional ability on performance biomechanics. J. Geom.: Med. Sci. 46(3), M91–98 (1991)
2. Hughes, M.A., Schenkman, M.L.: Chair rise strategy in the functionally impaired elderly. J. Rehabil. Res. Dev. 33(4), 409–412 (1996)
3. Cabinet Office, Government of Japan, KOUREISHA HAKUSHO (The whitepaper on the aged society), p. 25 (2011). ISBN: 4904681010 (in Japanese)
4. Nagai, K., Nakanishi, I., Hanabusa, H.: Assistance of self-transfer of patients using a power-assisting device. In: Proceedings of the IEEE International Conference on Robotics and Automation, pp. 4008–4015 (2003)
5. Funakubo, A., Tanishiro, H., Fukui, Y.: Power assist system for transfer aid. J. Soc. Instrum. Control Eng. 40(5), 391–395 (2001)