1. Aschan, C., Rajamäki, E., Hirvonen, M., Mannelin, T., 2001. Safety properties of lumber wraps in stevedoring. Final Report. Finnish Institute of Occupational Health, Helsinki, 23pp.+appendices (in Finnish.)
2. The role of friction in the measurement of slipperiness, Part 2;Chang;Ergonomics,2001
3. Occupational slip, trip, and fall-related injuries—can the contribution of slipperiness be isolated?;Courtney;Ergonomics,2001
4. European standard EN 345:1992. Specification for safety footwear for professional use.
5. Federal Register, Department of Labor, Occupational Safety and Health Administration, 1997. Vol. 62 (143), pp. 40141–40234.