Authors:
Farrell, PSE
Hollands, JG
Taylor, MM
Gamble, HD
Citation: Pse. Farrell et al., Perceptual control and layered protocols in interface design: I. Fundamental concepts, INT J HUM-C, 50(6), 1999, pp. 489-520
Citation: Mm. Taylor et al., Perceptual control and layered protocols in interface design: II. The general protocol grammar, INT J HUM-C, 50(6), 1999, pp. 521-555