1. Rice DP, Mackenzie EJ. Cost of injury in the United States: report to Congress, (282 pp). San Francisco, CA: Institute for Health and Aging, University of California and Injury Prevention Center, The Johns Hopkins University, 1989.
2. Occupational slips and falls: more than a trivial problem;Leamon;Ergonomics,1995
3. Investigation of floor surface profile characteristics that will reduce the incidence of slips and falls;Lloyd;Mech. Eng. Trans.: Instn. Engrs. (Aus.),1992
4. Economic dimensions of slip and fall injuries;Englander;J. Forensic Sci.,1996
5. Amontons M. De la resistance causees dans les machines. Histoire de l'academie royal des sciences 1699:266.