1. Fracture of the femur in old age: a two-centre study of associated clinical factors and the cause of the fall;Brocklehurst;Age aging,1978
2. Slip resistance on icy surfaces of shoes, crampons and chains — a new machine;Bruce;Journal of Occupational Accidents,1986
3. Council Directive 89/686/EEC, 21 December 1989. The approximation of laws of the member states relating to personal protective equipment (PPE). Official Journal of the European Communities No L 399, pp. 18–38.
4. Grönqvist, R., 1995. A dynamic method for assessing pedestrian slip resistance. Thesis, Finnish Institute of Occupational Health, Helsinki.
5. Grönqvist, R., Mäkinen, H., 1997. Development of standards for anti-slip devices for pedestrians. In: Nielsen, R., Borg, C. (Eds.) Proceedings of the Fifth Scandinavian Symposium on Protective Clothing, (NOKOBETEF) Danish Work Environment Fund, May 5–8, Elsinore, Denmark, pp. 187–189.