1. Stepladder accidents — a 5-year analysis of these falls from a height;Arnold;Beitrage zur Orthopadie und Traumatologie,1989
2. The injury fact book;Baker,1984
3. Pedal cycling accidents in northern Sweden;Björnstig;Acta Chirurgica Scandanavia,1984
4. The abbreviated injury scale;Committee on Injury Scaling,1985
5. Improve safety;Danielsson,1987