Impedance Fields for Trajectory Enhancement in the Intelligent Assist Device. - Greg R. Luecke; Kok-Leong Tan; Naci Zafer (ICRA, 2000)

Control of lift assist devices for performance enhancement. - Greg R. Luecke; Kok-Leong Tan; Sean Mahrt (Mobile Robots / Telemanipulator and Telepresence Technologies, 2000)