Vision assisted control for manipulation using virtual fixtures. - Alessandro Bettini; Samuel Lang; Allison M. Okamura; Gregory D. Hager (IROS, 2001)

Vision Assisted Control for Manipulation using Virtual Fixtures: Experiments at Macro and Micro Scales. - Alessandro Bettini; Samuel Lang; Allison M. Okamura; Gregory D. Hager (ICRA, 2002)

Effect of virtual fixture compliance on human-machine cooperative manipulation. - Panadda Marayong; Alessandro Bettini; Allison M. Okamura (IROS, 2002)

Vision-assisted control for manipulation using virtual fixtures. - Alessandro Bettini; Panadda Marayong; Samuel Lang; Allison M. Okamura; Gregory D. Hager (IEEE Trans. Robotics, 2004)