1. Random House Dictionary, Random House, New York, 1978.
2. Old Testament, I Samuel 17:49.
3. Karlson TA (1982) The incidence of hospital-treated facial injuries from vehicles. Trauma 22 (4).
4. Backaitis SH, Dalmotas DJ. Injury patterns and injury sources of unrestrained and three point belt restrained car occupants in injury producing frontal collisions. 29th AAAM, p 365, October 7–9, 1985.
5. Cesari D, Ramet M, Welbourne E. Experimental evaluation of human facial tolerance to injuries. 1989 IRCOBI, Stockholm, Sweden, September 13–15, 1989.