1. Adler, Robert, Desmares, Peter J., and Fitzgibbon, James J. (1986). SID International Symposium. Digest of Technical Papers 17 316–317.
2. An Optical Tactile Array Sensor, Tech Report 84–26 (Computer and Information Science Dept., U. of Mass., Amherst, MA, 1984).
3. Aretz, Anthony J. (1983). A Comparison of Manual and Vocal Response Modes for the Control of Aircraft Subsystems, AFWAL-TR-83–3005.
4. Considerations on using a lightpen-interactive system with young children