1. Alami R, Albu-Schaeffer A, Bicchi A, et al. Safe and dependable physical human-robot interaction in anthropic domains: State of the art and challenges. In: Proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems. Beijing: IEEE, 2006
2. Bedaf S, Gelderblom G J, De Witte L. Overview and categorization of robots supporting independent living of elderly people: What activities do they support and how far have they developed. Assistive Technology, 2015, 27(2): 88–100
3. WHO. Good Health Adds Life to Years. Global Brief for World Health Day 2012. 2012. Retrieved form http://www.who.int/ageing/publications/whd2012_global_brief/en/
4. Stevens J A, Thomas K, Teh L, et al. Unintentional fall injuries associated with walkers and canes in older adults treated in US emergency departments. Journal of the American Geriatrics Society, 2009, 57(8): 1464–1469
5. Noury N, Fleury A, Rumeau P, et al. Fall detection-principles and methods. In: Proceedings of 29th Annual International Conference of the IEEE on Engineering in Medicine and Biology Society. Lyon: IEEE, 2007