1. J. Edworthy, S. Loxley, and I. Dennis, Improving auditory warning design: Relationship between warning sound parameters and perceived urgency. Human Factors, 33, 205-231 (1991);
2. R.D. Socking, Design of auditory and tactile displays, in Handbook of Human Factors, G. Salvendy, Ed. (Wiley-Intersdence, New York, 1987); M.S. Wogalter and S. L. Young, Behavioral compliance to voice and print warnings, Ergonomics, 34, 79-89 (1991).
3. M.S. Sanders and E.J. McCormick, Human Factors in Engineering and Design, 7th ed. (McGraw-Hill, New York, 1993); M.S. Wogalter, S.S. Godfrey, G.A. Fontenelle, D.R. Desaulniers, P.R. Rothstein, and K. R. Laughery, Effectiveness of warnings, Human Factors, 29, 599-612 (1987);
4. S.L. Young and M.S. Wogalter, Effects of conspicuous print and pictorial icons on comprehension and memory of instruction manual warnings, Human Factors, 32, 637-649 (1990).
5. A. Chapanis, Hazards associated with three signal words and four colours on warning signs, Ergonomics, 37, 265-275 (1994);