1. Human factors problems in computer generated graphic displays;Barmack;Institute for Defence Analysis, Report S-234,1966
2. Representation and understanding in the use of symbols and pictograms;Barnard,1984
3. Improving the legibility of VDUs through contrast reversal;Bauer,1980
4. Absolute identification of colour for targets presented against white and coloured backgrounds;Bishop;Wright Air Development Division Report No WADD TR 60-611,1960