1. 1) 総理府:障害者白書, 平成8年 (1996)
2. 2) Kumar, V. and Krovi, V.: Optimal Traction Control In A Wheelchair With legs And Wheels, Proceedings of 4th national Applied Mechanisms and Robotics Conference, December 95, 95-030-01 - 95-030-07 (1995)
3. 3) ジョンソン&ジョンソンホームページ : http://www.indetech.com (2002)
4. 5) Sugiyama, K. : Development of Stair-climbing Machines at Nagasaki, Proceedings of the 3rd IWAM’99, 214-217 (1999)
5. A Study of the Wheel-Feet Mechanism for Stair Climbing.