Development of the omni-directional, power-assisted cart. - Hiroshi Maeda; Shigeki Fujiwara; Hitoshi Kitano; Hideki Yamashita (Adv. Robotics, 2001)

Omnidirectional Cart with Power-assist System. - Shigeki Fujiwara; Hitoshi Kitano; Hideki Yamashita; Hiroshi Maeda; Hideo Fukunaga (J. Robotics Mechatronics, 2002)