1. Radwin RG, Lavender SA. Work factors, personal factors, and internal loads: biomechanics of work stressors. In: National Research Council. Work-related musculoskeletal disorders. The research base. Washington, DC, USA: National Academy Press; 1998.
2. Kroemer KHE, Grandjean E. Fitting the task to the human: a text book of occupational ergonomics. 5th ed. London, UK: Taylor & Francis; 1997.
3. Hagberg M, Silverstein B, Wells R, Smith MJ, Hendrick HW, Carayon P, et al. Work related musculoskeletal disorders (WMSDs): a reference book for prevention. London, UK: Taylor & Francis; 1995.
4. Armstrong TJ. Upper extremity postures: definition, measurement and control. In: Corlett N, Wilson J, Manenica I, editors. Ergonomics of working postures: models, methods and cases. London, UK: Taylor & Francis; 1986. p. 59–73.
5. Chaffin DB, Anderson G. Occupational biomechanics. New York, USA: Wiley; 1984.