1. Home Safety Guidelines for Architects and Builders;Alessi,1978
2. Guidelines for stair safety;Archea,1979
3. Safety on stairs;Carson,1978
4. Safety of machinery. Basic concepts, General principles for design;CEN;European Standard CEN/TC 114/WG 2 N 87,1988
5. Stair accident scenarios and stair design;Goossens,1987