1. The Abbreviated Injury Scale 1980 Revision;AIS,1980
2. American National Standard for Protective Headgear—for Bicyclists;ANSI,1984
3. Lightweight protective helmets (For use in pedal cycling, horse riding and other activities requiring similar protection) Part 2—Helmets for pedal cy;AS,1986
4. Do Bicycle Safety Helmets Reduce Severity of Head Injury in Real Crashes?;Dorsch,1984
5. The Epidemiology of Injuries to Bicycle Riders;Friede;Pediatr. Clin. North Am.,1985