1. Feeling it as well as seeing it—haptic display within gestural HCI for multimedia telematics services;hardwick,1996
2. Computational haptics: the sandpaper system for synthesizing texture for a force-feedback display;Minsky,1995
3. Mathematical Methods of Physics;Mathews,1970
4. C. Colwell, Personal communication, University of Hertfordshire Sensory Disabilities Research Unit, 1997.
5. Fragments and signposts: user's models of the system;Hammond,1983