1. Safety color code Z535.1;ANSI,1991
2. American national standard for product safety signs and labels: Z535.4;ANSI,1991
3. Braun, C.C. and Silver, N.C., in press. The interaction of signal word and color on warning labels: Differences in perceived hazard and behavioral compliance. Ergonomics.
4. Likelihood of reading warnings: The effect of font and font sizes;Braun,1992
5. The hazard association values of accident-prevention signs;Bresnahan;Professional Safety,1975