1. Touch displays: a programmed man-machine interface;Johnson;Ergonomics,1967
2. Digilux touch sensitive panel;Bird,1977
3. Programming a touch screen device;Howe;Management Informatics,1974
4. Acoustical touch panel;Fajans;IBM tech disclosure bulletin,1977
5. The Touchpad — a versatile interactive computer input device;Newton;Royal Signals and Radar Establishment memo 3229,1980